Home / 1,660.24-2,490.40-686.08

Finding the Fourth Proportional to 1,660.24, 2,490.40 and 686.08

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Solution

The fourth proportional to 1,660.24, 2,490.40 and 686.08 is: 1,029.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.24 : 2,490.40 = 686.08 : x
  2. Step 2: Convert to fraction form
    1,660.24/2,490.40 = 686.08/x
  3. Step 3: Cross multiply
    1,660.24x = 2,490.40 × 686.08
  4. Step 4: Simplify right side
    1,660.24x = 1,708,613.63
  5. Step 5: Solve for x
    x = 1,708,613.63/1,660.24
  6. Step 6: Final answer
    x = 1,029.14

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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.