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Finding the Fourth Proportional to 767.46, 1,061.88 and 669.42

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Solution

The fourth proportional to 767.46, 1,061.88 and 669.42 is: 926.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.46 : 1,061.88 = 669.42 : x
  2. Step 2: Convert to fraction form
    767.46/1,061.88 = 669.42/x
  3. Step 3: Cross multiply
    767.46x = 1,061.88 × 669.42
  4. Step 4: Simplify right side
    767.46x = 710,843.71
  5. Step 5: Solve for x
    x = 710,843.71/767.46
  6. Step 6: Final answer
    x = 926.23

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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.