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Finding the Fourth Proportional to 1,687.57, 2,530.04 and 1,071.16

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Solution

The fourth proportional to 1,687.57, 2,530.04 and 1,071.16 is: 1,605.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.57 : 2,530.04 = 1,071.16 : x
  2. Step 2: Convert to fraction form
    1,687.57/2,530.04 = 1,071.16/x
  3. Step 3: Cross multiply
    1,687.57x = 2,530.04 × 1,071.16
  4. Step 4: Simplify right side
    1,687.57x = 2,710,065.97
  5. Step 5: Solve for x
    x = 2,710,065.97/1,687.57
  6. Step 6: Final answer
    x = 1,605.90

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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.