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Finding the Fourth Proportional to 864.08, 1,192.27 and 490.97

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Solution

The fourth proportional to 864.08, 1,192.27 and 490.97 is: 677.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.08 : 1,192.27 = 490.97 : x
  2. Step 2: Convert to fraction form
    864.08/1,192.27 = 490.97/x
  3. Step 3: Cross multiply
    864.08x = 1,192.27 × 490.97
  4. Step 4: Simplify right side
    864.08x = 585,368.80
  5. Step 5: Solve for x
    x = 585,368.80/864.08
  6. Step 6: Final answer
    x = 677.45

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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.