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Finding the Fourth Proportional to 381,521.10, 572,281.65 and 132,228.30

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Solution

The fourth proportional to 381,521.10, 572,281.65 and 132,228.30 is: 198,342.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,521.10 : 572,281.65 = 132,228.30 : x
  2. Step 2: Convert to fraction form
    381,521.10/572,281.65 = 132,228.30/x
  3. Step 3: Cross multiply
    381,521.10x = 572,281.65 × 132,228.30
  4. Step 4: Simplify right side
    381,521.10x = 75,671,829,700.70
  5. Step 5: Solve for x
    x = 75,671,829,700.70/381,521.10
  6. Step 6: Final answer
    x = 198,342.45

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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.