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Finding the Fourth Proportional to 521,897.97, 720,206.95 and 307,051.86

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Solution

The fourth proportional to 521,897.97, 720,206.95 and 307,051.86 is: 423,724.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,897.97 : 720,206.95 = 307,051.86 : x
  2. Step 2: Convert to fraction form
    521,897.97/720,206.95 = 307,051.86/x
  3. Step 3: Cross multiply
    521,897.97x = 720,206.95 × 307,051.86
  4. Step 4: Simplify right side
    521,897.97x = 221,140,883,582.43
  5. Step 5: Solve for x
    x = 221,140,883,582.43/521,897.97
  6. Step 6: Final answer
    x = 423,724.36

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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.