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Finding the Fourth Proportional to 1,580.64, 2,371.92 and 656.28

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Solution

The fourth proportional to 1,580.64, 2,371.92 and 656.28 is: 984.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.64 : 2,371.92 = 656.28 : x
  2. Step 2: Convert to fraction form
    1,580.64/2,371.92 = 656.28/x
  3. Step 3: Cross multiply
    1,580.64x = 2,371.92 × 656.28
  4. Step 4: Simplify right side
    1,580.64x = 1,556,643.66
  5. Step 5: Solve for x
    x = 1,556,643.66/1,580.64
  6. Step 6: Final answer
    x = 984.82

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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.