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Finding the Fourth Proportional to 1,543.29, 2,129.79 and 880.08

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Solution

The fourth proportional to 1,543.29, 2,129.79 and 880.08 is: 1,214.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.29 : 2,129.79 = 880.08 : x
  2. Step 2: Convert to fraction form
    1,543.29/2,129.79 = 880.08/x
  3. Step 3: Cross multiply
    1,543.29x = 2,129.79 × 880.08
  4. Step 4: Simplify right side
    1,543.29x = 1,874,385.58
  5. Step 5: Solve for x
    x = 1,874,385.58/1,543.29
  6. Step 6: Final answer
    x = 1,214.54

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1.5x scale

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.