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Finding the Fourth Proportional to 520,069.70, 780,104.55 and 253,871.30

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Solution

The fourth proportional to 520,069.70, 780,104.55 and 253,871.30 is: 380,806.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,069.70 : 780,104.55 = 253,871.30 : x
  2. Step 2: Convert to fraction form
    520,069.70/780,104.55 = 253,871.30/x
  3. Step 3: Cross multiply
    520,069.70x = 780,104.55 × 253,871.30
  4. Step 4: Simplify right side
    520,069.70x = 198,046,156,244.42
  5. Step 5: Solve for x
    x = 198,046,156,244.42/520,069.70
  6. Step 6: Final answer
    x = 380,806.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.