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Finding the Fourth Proportional to 285,484.96, 428,248.68 and 85,789.36

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Solution

The fourth proportional to 285,484.96, 428,248.68 and 85,789.36 is: 128,690.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,484.96 : 428,248.68 = 85,789.36 : x
  2. Step 2: Convert to fraction form
    285,484.96/428,248.68 = 85,789.36/x
  3. Step 3: Cross multiply
    285,484.96x = 428,248.68 × 85,789.36
  4. Step 4: Simplify right side
    285,484.96x = 36,739,180,178.04
  5. Step 5: Solve for x
    x = 36,739,180,178.04/285,484.96
  6. Step 6: Final answer
    x = 128,690.42

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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.