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Finding the Fourth Proportional to 1,543.79, 2,129.93 and 880.52

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Solution

The fourth proportional to 1,543.79, 2,129.93 and 880.52 is: 1,214.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.79 : 2,129.93 = 880.52 : x
  2. Step 2: Convert to fraction form
    1,543.79/2,129.93 = 880.52/x
  3. Step 3: Cross multiply
    1,543.79x = 2,129.93 × 880.52
  4. Step 4: Simplify right side
    1,543.79x = 1,875,434.21
  5. Step 5: Solve for x
    x = 1,875,434.21/1,543.79
  6. Step 6: Final answer
    x = 1,214.82

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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.