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Finding the Fourth Proportional to 521,897.61, 720,151.38 and 306,959.25

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Solution

The fourth proportional to 521,897.61, 720,151.38 and 306,959.25 is: 423,564.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,897.61 : 720,151.38 = 306,959.25 : x
  2. Step 2: Convert to fraction form
    521,897.61/720,151.38 = 306,959.25/x
  3. Step 3: Cross multiply
    521,897.61x = 720,151.38 × 306,959.25
  4. Step 4: Simplify right side
    521,897.61x = 221,057,127,491.27
  5. Step 5: Solve for x
    x = 221,057,127,491.27/521,897.61
  6. Step 6: Final answer
    x = 423,564.17

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1.5x scale

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.