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Finding the Fourth Proportional to 318,957.80, 478,436.70 and 266,469.80

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Solution

The fourth proportional to 318,957.80, 478,436.70 and 266,469.80 is: 399,704.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,957.80 : 478,436.70 = 266,469.80 : x
  2. Step 2: Convert to fraction form
    318,957.80/478,436.70 = 266,469.80/x
  3. Step 3: Cross multiply
    318,957.80x = 478,436.70 × 266,469.80
  4. Step 4: Simplify right side
    318,957.80x = 127,488,931,761.66
  5. Step 5: Solve for x
    x = 127,488,931,761.66/318,957.80
  6. Step 6: Final answer
    x = 399,704.70

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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.