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Finding the Fourth Proportional to 1,135.92, 1,701.68 and 875.68

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Solution

The fourth proportional to 1,135.92, 1,701.68 and 875.68 is: 1,311.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.92 : 1,701.68 = 875.68 : x
  2. Step 2: Convert to fraction form
    1,135.92/1,701.68 = 875.68/x
  3. Step 3: Cross multiply
    1,135.92x = 1,701.68 × 875.68
  4. Step 4: Simplify right side
    1,135.92x = 1,490,127.14
  5. Step 5: Solve for x
    x = 1,490,127.14/1,135.92
  6. Step 6: Final answer
    x = 1,311.82

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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.