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Finding the Fourth Proportional to 652,098,910.80, 978,148,366.20 and 434,420,677.20

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Solution

The fourth proportional to 652,098,910.80, 978,148,366.20 and 434,420,677.20 is: 651,631,015.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,098,910.80 : 978,148,366.20 = 434,420,677.20 : x
  2. Step 2: Convert to fraction form
    652,098,910.80/978,148,366.20 = 434,420,677.20/x
  3. Step 3: Cross multiply
    652,098,910.80x = 978,148,366.20 × 434,420,677.20
  4. Step 4: Simplify right side
    652,098,910.80x = 424,927,875,646,677,568
  5. Step 5: Solve for x
    x = 424,927,875,646,677,568/652,098,910.80
  6. Step 6: Final answer
    x = 651,631,015.80

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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.