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Finding the Fourth Proportional to 1,126.59, 1,689.88 and 346.55

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Solution

The fourth proportional to 1,126.59, 1,689.88 and 346.55 is: 519.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.59 : 1,689.88 = 346.55 : x
  2. Step 2: Convert to fraction form
    1,126.59/1,689.88 = 346.55/x
  3. Step 3: Cross multiply
    1,126.59x = 1,689.88 × 346.55
  4. Step 4: Simplify right side
    1,126.59x = 585,627.91
  5. Step 5: Solve for x
    x = 585,627.91/1,126.59
  6. Step 6: Final answer
    x = 519.82

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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.