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Finding the Fourth Proportional to 2,445.76, 3,375.14 and 1,397.82

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Solution

The fourth proportional to 2,445.76, 3,375.14 and 1,397.82 is: 1,928.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,445.76 : 3,375.14 = 1,397.82 : x
  2. Step 2: Convert to fraction form
    2,445.76/3,375.14 = 1,397.82/x
  3. Step 3: Cross multiply
    2,445.76x = 3,375.14 × 1,397.82
  4. Step 4: Simplify right side
    2,445.76x = 4,717,838.19
  5. Step 5: Solve for x
    x = 4,717,838.19/2,445.76
  6. Step 6: Final answer
    x = 1,928.99

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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.