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Finding the Fourth Proportional to 318,049.29, 438,900.66 and 172,851.66

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Solution

The fourth proportional to 318,049.29, 438,900.66 and 172,851.66 is: 238,531.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,049.29 : 438,900.66 = 172,851.66 : x
  2. Step 2: Convert to fraction form
    318,049.29/438,900.66 = 172,851.66/x
  3. Step 3: Cross multiply
    318,049.29x = 438,900.66 × 172,851.66
  4. Step 4: Simplify right side
    318,049.29x = 75,864,707,656.10
  5. Step 5: Solve for x
    x = 75,864,707,656.10/318,049.29
  6. Step 6: Final answer
    x = 238,531.29

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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.