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Finding the Fourth Proportional to 1,171.39, 1,757.30 and 555.15

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Solution

The fourth proportional to 1,171.39, 1,757.30 and 555.15 is: 832.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.39 : 1,757.30 = 555.15 : x
  2. Step 2: Convert to fraction form
    1,171.39/1,757.30 = 555.15/x
  3. Step 3: Cross multiply
    1,171.39x = 1,757.30 × 555.15
  4. Step 4: Simplify right side
    1,171.39x = 975,565.10
  5. Step 5: Solve for x
    x = 975,565.10/1,171.39
  6. Step 6: Final answer
    x = 832.83

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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.