Home / 1,397.71-1,925.40-1,176.58

Finding the Fourth Proportional to 1,397.71, 1,925.40 and 1,176.58

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Solution

The fourth proportional to 1,397.71, 1,925.40 and 1,176.58 is: 1,620.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.71 : 1,925.40 = 1,176.58 : x
  2. Step 2: Convert to fraction form
    1,397.71/1,925.40 = 1,176.58/x
  3. Step 3: Cross multiply
    1,397.71x = 1,925.40 × 1,176.58
  4. Step 4: Simplify right side
    1,397.71x = 2,265,387.13
  5. Step 5: Solve for x
    x = 2,265,387.13/1,397.71
  6. Step 6: Final answer
    x = 1,620.78

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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.