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Finding the Fourth Proportional to 521,899.61, 720,209.22 and 307,053.48

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Solution

The fourth proportional to 521,899.61, 720,209.22 and 307,053.48 is: 423,726.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,899.61 : 720,209.22 = 307,053.48 : x
  2. Step 2: Convert to fraction form
    521,899.61/720,209.22 = 307,053.48/x
  3. Step 3: Cross multiply
    521,899.61x = 720,209.22 × 307,053.48
  4. Step 4: Simplify right side
    521,899.61x = 221,142,747,329.09
  5. Step 5: Solve for x
    x = 221,142,747,329.09/521,899.61
  6. Step 6: Final answer
    x = 423,726.60

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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.