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Finding the Fourth Proportional to 521,894.71, 720,202.50 and 307,048.61

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Solution

The fourth proportional to 521,894.71, 720,202.50 and 307,048.61 is: 423,719.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,894.71 : 720,202.50 = 307,048.61 : x
  2. Step 2: Convert to fraction form
    521,894.71/720,202.50 = 307,048.61/x
  3. Step 3: Cross multiply
    521,894.71x = 720,202.50 × 307,048.61
  4. Step 4: Simplify right side
    521,894.71x = 221,137,176,543.53
  5. Step 5: Solve for x
    x = 221,137,176,543.53/521,894.71
  6. Step 6: Final answer
    x = 423,719.90

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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.