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Finding the Fourth Proportional to 1,568.76, 2,352.87 and 644.55

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Solution

The fourth proportional to 1,568.76, 2,352.87 and 644.55 is: 966.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,568.76 : 2,352.87 = 644.55 : x
  2. Step 2: Convert to fraction form
    1,568.76/2,352.87 = 644.55/x
  3. Step 3: Cross multiply
    1,568.76x = 2,352.87 × 644.55
  4. Step 4: Simplify right side
    1,568.76x = 1,516,542.36
  5. Step 5: Solve for x
    x = 1,516,542.36/1,568.76
  6. Step 6: Final answer
    x = 966.71

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1.5x scale

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.