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Finding the Fourth Proportional to 1,140.43, 1,710.72 and 360.46

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Solution

The fourth proportional to 1,140.43, 1,710.72 and 360.46 is: 540.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.43 : 1,710.72 = 360.46 : x
  2. Step 2: Convert to fraction form
    1,140.43/1,710.72 = 360.46/x
  3. Step 3: Cross multiply
    1,140.43x = 1,710.72 × 360.46
  4. Step 4: Simplify right side
    1,140.43x = 616,646.13
  5. Step 5: Solve for x
    x = 616,646.13/1,140.43
  6. Step 6: Final answer
    x = 540.71

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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.