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Finding the Fourth Proportional to 525,702,663.60, 788,553,995.40 and 389,653,767.60

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Solution

The fourth proportional to 525,702,663.60, 788,553,995.40 and 389,653,767.60 is: 584,480,651.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,702,663.60 : 788,553,995.40 = 389,653,767.60 : x
  2. Step 2: Convert to fraction form
    525,702,663.60/788,553,995.40 = 389,653,767.60/x
  3. Step 3: Cross multiply
    525,702,663.60x = 788,553,995.40 × 389,653,767.60
  4. Step 4: Simplify right side
    525,702,663.60x = 307,263,035,263,643,072
  5. Step 5: Solve for x
    x = 307,263,035,263,643,072/525,702,663.60
  6. Step 6: Final answer
    x = 584,480,651.40

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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.