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Finding the Fourth Proportional to 737.74, 1,015.50 and 644.32

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Solution

The fourth proportional to 737.74, 1,015.50 and 644.32 is: 886.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.74 : 1,015.50 = 644.32 : x
  2. Step 2: Convert to fraction form
    737.74/1,015.50 = 644.32/x
  3. Step 3: Cross multiply
    737.74x = 1,015.50 × 644.32
  4. Step 4: Simplify right side
    737.74x = 654,306.96
  5. Step 5: Solve for x
    x = 654,306.96/737.74
  6. Step 6: Final answer
    x = 886.91

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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.