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Finding the Fourth Proportional to 1,142.60, 1,543.73 and 1,142.60

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Solution

The fourth proportional to 1,142.60, 1,543.73 and 1,142.60 is: 1,543.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,142.60 : 1,543.73 = 1,142.60 : x
  2. Step 2: Convert to fraction form
    1,142.60/1,543.73 = 1,142.60/x
  3. Step 3: Cross multiply
    1,142.60x = 1,543.73 × 1,142.60
  4. Step 4: Simplify right side
    1,142.60x = 1,763,860.19
  5. Step 5: Solve for x
    x = 1,763,860.19/1,142.60
  6. Step 6: Final answer
    x = 1,543.73

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.