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Finding the Fourth Proportional to 525,687,659.80, 788,531,489.70 and 442,463,999.20

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Solution

The fourth proportional to 525,687,659.80, 788,531,489.70 and 442,463,999.20 is: 663,695,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,687,659.80 : 788,531,489.70 = 442,463,999.20 : x
  2. Step 2: Convert to fraction form
    525,687,659.80/788,531,489.70 = 442,463,999.20/x
  3. Step 3: Cross multiply
    525,687,659.80x = 788,531,489.70 × 442,463,999.20
  4. Step 4: Simplify right side
    525,687,659.80x = 348,896,796,427,795,648
  5. Step 5: Solve for x
    x = 348,896,796,427,795,648/525,687,659.80
  6. Step 6: Final answer
    x = 663,695,998.80

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.