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Finding the Fourth Proportional to 318,957.50, 478,439.76 and 136,563.72

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Solution

The fourth proportional to 318,957.50, 478,439.76 and 136,563.72 is: 204,847.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,957.50 : 478,439.76 = 136,563.72 : x
  2. Step 2: Convert to fraction form
    318,957.50/478,439.76 = 136,563.72/x
  3. Step 3: Cross multiply
    318,957.50x = 478,439.76 × 136,563.72
  4. Step 4: Simplify right side
    318,957.50x = 65,337,514,830.70
  5. Step 5: Solve for x
    x = 65,337,514,830.70/318,957.50
  6. Step 6: Final answer
    x = 204,847.09

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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.