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Finding the Fourth Proportional to 318,635.78, 439,717.35 and 173,442.13

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Solution

The fourth proportional to 318,635.78, 439,717.35 and 173,442.13 is: 239,350.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,635.78 : 439,717.35 = 173,442.13 : x
  2. Step 2: Convert to fraction form
    318,635.78/439,717.35 = 173,442.13/x
  3. Step 3: Cross multiply
    318,635.78x = 439,717.35 × 173,442.13
  4. Step 4: Simplify right side
    318,635.78x = 76,265,513,781.96
  5. Step 5: Solve for x
    x = 76,265,513,781.96/318,635.78
  6. Step 6: Final answer
    x = 239,350.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.