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Finding the Fourth Proportional to 521,527.71, 719,819.45 and 306,790.28

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Solution

The fourth proportional to 521,527.71, 719,819.45 and 306,790.28 is: 423,436.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,527.71 : 719,819.45 = 306,790.28 : x
  2. Step 2: Convert to fraction form
    521,527.71/719,819.45 = 306,790.28/x
  3. Step 3: Cross multiply
    521,527.71x = 719,819.45 × 306,790.28
  4. Step 4: Simplify right side
    521,527.71x = 220,833,610,614.95
  5. Step 5: Solve for x
    x = 220,833,610,614.95/521,527.71
  6. Step 6: Final answer
    x = 423,436.01

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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.