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Finding the Fourth Proportional to 458,764.78, 687,370.64 and 280,900.40

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Solution

The fourth proportional to 458,764.78, 687,370.64 and 280,900.40 is: 420,875.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,764.78 : 687,370.64 = 280,900.40 : x
  2. Step 2: Convert to fraction form
    458,764.78/687,370.64 = 280,900.40/x
  3. Step 3: Cross multiply
    458,764.78x = 687,370.64 × 280,900.40
  4. Step 4: Simplify right side
    458,764.78x = 193,082,687,724.26
  5. Step 5: Solve for x
    x = 193,082,687,724.26/458,764.78
  6. Step 6: Final answer
    x = 420,875.13

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1.5x scale

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.