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Finding the Fourth Proportional to 1,543.60, 2,130 and 880.42

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Solution

The fourth proportional to 1,543.60, 2,130 and 880.42 is: 1,214.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.60 : 2,130 = 880.42 : x
  2. Step 2: Convert to fraction form
    1,543.60/2,130 = 880.42/x
  3. Step 3: Cross multiply
    1,543.60x = 2,130 × 880.42
  4. Step 4: Simplify right side
    1,543.60x = 1,875,294.60
  5. Step 5: Solve for x
    x = 1,875,294.60/1,543.60
  6. Step 6: Final answer
    x = 1,214.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.