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Finding the Fourth Proportional to 717,827.69, 990,428.90 and 472,786.49

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Solution

The fourth proportional to 717,827.69, 990,428.90 and 472,786.49 is: 652,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,827.69 : 990,428.90 = 472,786.49 : x
  2. Step 2: Convert to fraction form
    717,827.69/990,428.90 = 472,786.49/x
  3. Step 3: Cross multiply
    717,827.69x = 990,428.90 × 472,786.49
  4. Step 4: Simplify right side
    717,827.69x = 468,261,395,909.48
  5. Step 5: Solve for x
    x = 468,261,395,909.48/717,827.69
  6. Step 6: Final answer
    x = 652,331.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.