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Finding the Fourth Proportional to 2,124.76, 3,187.70 and 891.52

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Solution

The fourth proportional to 2,124.76, 3,187.70 and 891.52 is: 1,337.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,124.76 : 3,187.70 = 891.52 : x
  2. Step 2: Convert to fraction form
    2,124.76/3,187.70 = 891.52/x
  3. Step 3: Cross multiply
    2,124.76x = 3,187.70 × 891.52
  4. Step 4: Simplify right side
    2,124.76x = 2,841,898.30
  5. Step 5: Solve for x
    x = 2,841,898.30/2,124.76
  6. Step 6: Final answer
    x = 1,337.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.