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Finding the Fourth Proportional to 1,397.71, 2,097.08 and 739.62

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Solution

The fourth proportional to 1,397.71, 2,097.08 and 739.62 is: 1,109.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.71 : 2,097.08 = 739.62 : x
  2. Step 2: Convert to fraction form
    1,397.71/2,097.08 = 739.62/x
  3. Step 3: Cross multiply
    1,397.71x = 2,097.08 × 739.62
  4. Step 4: Simplify right side
    1,397.71x = 1,551,043.85
  5. Step 5: Solve for x
    x = 1,551,043.85/1,397.71
  6. Step 6: Final answer
    x = 1,109.70

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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.