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Finding the Fourth Proportional to 520,806.46, 718,766.49 and 316,871.86

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Solution

The fourth proportional to 520,806.46, 718,766.49 and 316,871.86 is: 437,315.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,806.46 : 718,766.49 = 316,871.86 : x
  2. Step 2: Convert to fraction form
    520,806.46/718,766.49 = 316,871.86/x
  3. Step 3: Cross multiply
    520,806.46x = 718,766.49 × 316,871.86
  4. Step 4: Simplify right side
    520,806.46x = 227,756,874,591.97
  5. Step 5: Solve for x
    x = 227,756,874,591.97/520,806.46
  6. Step 6: Final answer
    x = 437,315.76

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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.