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Finding the Fourth Proportional to 1,520, 2,101.92 and 1,451.24

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Solution

The fourth proportional to 1,520, 2,101.92 and 1,451.24 is: 2,006.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520 : 2,101.92 = 1,451.24 : x
  2. Step 2: Convert to fraction form
    1,520/2,101.92 = 1,451.24/x
  3. Step 3: Cross multiply
    1,520x = 2,101.92 × 1,451.24
  4. Step 4: Simplify right side
    1,520x = 3,050,390.38
  5. Step 5: Solve for x
    x = 3,050,390.38/1,520
  6. Step 6: Final answer
    x = 2,006.84

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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.