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Finding the Fourth Proportional to 1,171.71, 1,757.77 and 349.90

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Solution

The fourth proportional to 1,171.71, 1,757.77 and 349.90 is: 524.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.71 : 1,757.77 = 349.90 : x
  2. Step 2: Convert to fraction form
    1,171.71/1,757.77 = 349.90/x
  3. Step 3: Cross multiply
    1,171.71x = 1,757.77 × 349.90
  4. Step 4: Simplify right side
    1,171.71x = 615,038.45
  5. Step 5: Solve for x
    x = 615,038.45/1,171.71
  6. Step 6: Final answer
    x = 524.91

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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.