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Finding the Fourth Proportional to 1,397.90, 2,097.93 and 576.74

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Solution

The fourth proportional to 1,397.90, 2,097.93 and 576.74 is: 865.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.90 : 2,097.93 = 576.74 : x
  2. Step 2: Convert to fraction form
    1,397.90/2,097.93 = 576.74/x
  3. Step 3: Cross multiply
    1,397.90x = 2,097.93 × 576.74
  4. Step 4: Simplify right side
    1,397.90x = 1,209,960.15
  5. Step 5: Solve for x
    x = 1,209,960.15/1,397.90
  6. Step 6: Final answer
    x = 865.56

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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.