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Finding the Fourth Proportional to 318,521.66, 477,778.84 and 128,930.42

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Solution

The fourth proportional to 318,521.66, 477,778.84 and 128,930.42 is: 193,394.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,521.66 : 477,778.84 = 128,930.42 : x
  2. Step 2: Convert to fraction form
    318,521.66/477,778.84 = 128,930.42/x
  3. Step 3: Cross multiply
    318,521.66x = 477,778.84 × 128,930.42
  4. Step 4: Simplify right side
    318,521.66x = 61,600,227,380.43
  5. Step 5: Solve for x
    x = 61,600,227,380.43/318,521.66
  6. Step 6: Final answer
    x = 193,394.16

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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.