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Finding the Fourth Proportional to 740.18, 1,020.92 and 474.62

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Solution

The fourth proportional to 740.18, 1,020.92 and 474.62 is: 654.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.18 : 1,020.92 = 474.62 : x
  2. Step 2: Convert to fraction form
    740.18/1,020.92 = 474.62/x
  3. Step 3: Cross multiply
    740.18x = 1,020.92 × 474.62
  4. Step 4: Simplify right side
    740.18x = 484,549.05
  5. Step 5: Solve for x
    x = 484,549.05/740.18
  6. Step 6: Final answer
    x = 654.64

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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.