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Finding the Fourth Proportional to 318,732.60, 478,811.70 and 266,244.60

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Solution

The fourth proportional to 318,732.60, 478,811.70 and 266,244.60 is: 399,962.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,732.60 : 478,811.70 = 266,244.60 : x
  2. Step 2: Convert to fraction form
    318,732.60/478,811.70 = 266,244.60/x
  3. Step 3: Cross multiply
    318,732.60x = 478,811.70 × 266,244.60
  4. Step 4: Simplify right side
    318,732.60x = 127,481,029,541.82
  5. Step 5: Solve for x
    x = 127,481,029,541.82/318,732.60
  6. Step 6: Final answer
    x = 399,962.32

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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.