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Finding the Fourth Proportional to 1,543.99, 2,130.83 and 880.69

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Solution

The fourth proportional to 1,543.99, 2,130.83 and 880.69 is: 1,215.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.99 : 2,130.83 = 880.69 : x
  2. Step 2: Convert to fraction form
    1,543.99/2,130.83 = 880.69/x
  3. Step 3: Cross multiply
    1,543.99x = 2,130.83 × 880.69
  4. Step 4: Simplify right side
    1,543.99x = 1,876,600.67
  5. Step 5: Solve for x
    x = 1,876,600.67/1,543.99
  6. Step 6: Final answer
    x = 1,215.42

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Half scale
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Double scale
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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.