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Finding the Fourth Proportional to 420,437.54, 580,835.68 and 275,587.14

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Solution

The fourth proportional to 420,437.54, 580,835.68 and 275,587.14 is: 380,724.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,437.54 : 580,835.68 = 275,587.14 : x
  2. Step 2: Convert to fraction form
    420,437.54/580,835.68 = 275,587.14/x
  3. Step 3: Cross multiply
    420,437.54x = 580,835.68 × 275,587.14
  4. Step 4: Simplify right side
    420,437.54x = 160,070,843,861.16
  5. Step 5: Solve for x
    x = 160,070,843,861.16/420,437.54
  6. Step 6: Final answer
    x = 380,724.43

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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.