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Finding the Fourth Proportional to 318,962.07, 478,446.53 and 136,568.30

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Solution

The fourth proportional to 318,962.07, 478,446.53 and 136,568.30 is: 204,853.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,962.07 : 478,446.53 = 136,568.30 : x
  2. Step 2: Convert to fraction form
    318,962.07/478,446.53 = 136,568.30/x
  3. Step 3: Cross multiply
    318,962.07x = 478,446.53 × 136,568.30
  4. Step 4: Simplify right side
    318,962.07x = 65,340,626,167.92
  5. Step 5: Solve for x
    x = 65,340,626,167.92/318,962.07
  6. Step 6: Final answer
    x = 204,853.91

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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.