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Finding the Fourth Proportional to 691.97, 955.22 and 482.45

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Solution

The fourth proportional to 691.97, 955.22 and 482.45 is: 665.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.97 : 955.22 = 482.45 : x
  2. Step 2: Convert to fraction form
    691.97/955.22 = 482.45/x
  3. Step 3: Cross multiply
    691.97x = 955.22 × 482.45
  4. Step 4: Simplify right side
    691.97x = 460,838.70
  5. Step 5: Solve for x
    x = 460,838.70/691.97
  6. Step 6: Final answer
    x = 665.99

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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.