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Finding the Fourth Proportional to 1,671.82, 2,506.95 and 891.61

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Solution

The fourth proportional to 1,671.82, 2,506.95 and 891.61 is: 1,337.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,671.82 : 2,506.95 = 891.61 : x
  2. Step 2: Convert to fraction form
    1,671.82/2,506.95 = 891.61/x
  3. Step 3: Cross multiply
    1,671.82x = 2,506.95 × 891.61
  4. Step 4: Simplify right side
    1,671.82x = 2,235,215.42
  5. Step 5: Solve for x
    x = 2,235,215.42/1,671.82
  6. Step 6: Final answer
    x = 1,337.00

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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.