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Finding the Fourth Proportional to 1,397.61, 2,096.13 and 410.31

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Solution

The fourth proportional to 1,397.61, 2,096.13 and 410.31 is: 615.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.61 : 2,096.13 = 410.31 : x
  2. Step 2: Convert to fraction form
    1,397.61/2,096.13 = 410.31/x
  3. Step 3: Cross multiply
    1,397.61x = 2,096.13 × 410.31
  4. Step 4: Simplify right side
    1,397.61x = 860,063.10
  5. Step 5: Solve for x
    x = 860,063.10/1,397.61
  6. Step 6: Final answer
    x = 615.38

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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.