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Finding the Fourth Proportional to 864.88, 1,192.18 and 677.92

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Solution

The fourth proportional to 864.88, 1,192.18 and 677.92 is: 934.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.88 : 1,192.18 = 677.92 : x
  2. Step 2: Convert to fraction form
    864.88/1,192.18 = 677.92/x
  3. Step 3: Cross multiply
    864.88x = 1,192.18 × 677.92
  4. Step 4: Simplify right side
    864.88x = 808,202.67
  5. Step 5: Solve for x
    x = 808,202.67/864.88
  6. Step 6: Final answer
    x = 934.47

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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.