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Finding the Fourth Proportional to 693.97, 1,040.61 and 474.93

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Solution

The fourth proportional to 693.97, 1,040.61 and 474.93 is: 712.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.97 : 1,040.61 = 474.93 : x
  2. Step 2: Convert to fraction form
    693.97/1,040.61 = 474.93/x
  3. Step 3: Cross multiply
    693.97x = 1,040.61 × 474.93
  4. Step 4: Simplify right side
    693.97x = 494,218.69
  5. Step 5: Solve for x
    x = 494,218.69/693.97
  6. Step 6: Final answer
    x = 712.16

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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.