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Finding the Fourth Proportional to 487,154,871.80, 730,732,307.70 and 472,805,964.80

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Solution

The fourth proportional to 487,154,871.80, 730,732,307.70 and 472,805,964.80 is: 709,208,947.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,154,871.80 : 730,732,307.70 = 472,805,964.80 : x
  2. Step 2: Convert to fraction form
    487,154,871.80/730,732,307.70 = 472,805,964.80/x
  3. Step 3: Cross multiply
    487,154,871.80x = 730,732,307.70 × 472,805,964.80
  4. Step 4: Simplify right side
    487,154,871.80x = 345,494,593,752,628,992
  5. Step 5: Solve for x
    x = 345,494,593,752,628,992/487,154,871.80
  6. Step 6: Final answer
    x = 709,208,947.20

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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.