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Finding the Fourth Proportional to 612,082.20, 918,123.30 and 543,847.80

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Solution

The fourth proportional to 612,082.20, 918,123.30 and 543,847.80 is: 815,771.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,082.20 : 918,123.30 = 543,847.80 : x
  2. Step 2: Convert to fraction form
    612,082.20/918,123.30 = 543,847.80/x
  3. Step 3: Cross multiply
    612,082.20x = 918,123.30 × 543,847.80
  4. Step 4: Simplify right side
    612,082.20x = 499,319,336,833.74
  5. Step 5: Solve for x
    x = 499,319,336,833.74/612,082.20
  6. Step 6: Final answer
    x = 815,771.70

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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.