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Finding the Fourth Proportional to 438,422.60, 657,633.90 and 105,998.60

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Solution

The fourth proportional to 438,422.60, 657,633.90 and 105,998.60 is: 158,997.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,422.60 : 657,633.90 = 105,998.60 : x
  2. Step 2: Convert to fraction form
    438,422.60/657,633.90 = 105,998.60/x
  3. Step 3: Cross multiply
    438,422.60x = 657,633.90 × 105,998.60
  4. Step 4: Simplify right side
    438,422.60x = 69,708,272,712.54
  5. Step 5: Solve for x
    x = 69,708,272,712.54/438,422.60
  6. Step 6: Final answer
    x = 158,997.90

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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.