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Finding the Fourth Proportional to 872.46, 1,202.76 and 740.22

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Solution

The fourth proportional to 872.46, 1,202.76 and 740.22 is: 1,020.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.46 : 1,202.76 = 740.22 : x
  2. Step 2: Convert to fraction form
    872.46/1,202.76 = 740.22/x
  3. Step 3: Cross multiply
    872.46x = 1,202.76 × 740.22
  4. Step 4: Simplify right side
    872.46x = 890,307.01
  5. Step 5: Solve for x
    x = 890,307.01/872.46
  6. Step 6: Final answer
    x = 1,020.46

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Double scale
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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.