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Finding the Fourth Proportional to 1,543.91, 2,130.80 and 880.81

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Solution

The fourth proportional to 1,543.91, 2,130.80 and 880.81 is: 1,215.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.91 : 2,130.80 = 880.81 : x
  2. Step 2: Convert to fraction form
    1,543.91/2,130.80 = 880.81/x
  3. Step 3: Cross multiply
    1,543.91x = 2,130.80 × 880.81
  4. Step 4: Simplify right side
    1,543.91x = 1,876,820.22
  5. Step 5: Solve for x
    x = 1,876,820.22/1,543.91
  6. Step 6: Final answer
    x = 1,215.63

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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.