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Finding the Fourth Proportional to 521,000.55, 719,122.19 and 306,209.61

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Solution

The fourth proportional to 521,000.55, 719,122.19 and 306,209.61 is: 422,652.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,000.55 : 719,122.19 = 306,209.61 : x
  2. Step 2: Convert to fraction form
    521,000.55/719,122.19 = 306,209.61/x
  3. Step 3: Cross multiply
    521,000.55x = 719,122.19 × 306,209.61
  4. Step 4: Simplify right side
    521,000.55x = 220,202,123,811.20
  5. Step 5: Solve for x
    x = 220,202,123,811.20/521,000.55
  6. Step 6: Final answer
    x = 422,652.38

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1.5x scale

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.