Home / 1,564.20-2,158.52-865.56

Finding the Fourth Proportional to 1,564.20, 2,158.52 and 865.56

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Solution

The fourth proportional to 1,564.20, 2,158.52 and 865.56 is: 1,194.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,564.20 : 2,158.52 = 865.56 : x
  2. Step 2: Convert to fraction form
    1,564.20/2,158.52 = 865.56/x
  3. Step 3: Cross multiply
    1,564.20x = 2,158.52 × 865.56
  4. Step 4: Simplify right side
    1,564.20x = 1,868,328.57
  5. Step 5: Solve for x
    x = 1,868,328.57/1,564.20
  6. Step 6: Final answer
    x = 1,194.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.