Home / 1,543.24-2,129.69-880.13

Finding the Fourth Proportional to 1,543.24, 2,129.69 and 880.13

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Solution

The fourth proportional to 1,543.24, 2,129.69 and 880.13 is: 1,214.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.24 : 2,129.69 = 880.13 : x
  2. Step 2: Convert to fraction form
    1,543.24/2,129.69 = 880.13/x
  3. Step 3: Cross multiply
    1,543.24x = 2,129.69 × 880.13
  4. Step 4: Simplify right side
    1,543.24x = 1,874,415.58
  5. Step 5: Solve for x
    x = 1,874,415.58/1,543.24
  6. Step 6: Final answer
    x = 1,214.60

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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.