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Finding the Fourth Proportional to 1,048.31, 1,446 and 674.66

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Solution

The fourth proportional to 1,048.31, 1,446 and 674.66 is: 930.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.31 : 1,446 = 674.66 : x
  2. Step 2: Convert to fraction form
    1,048.31/1,446 = 674.66/x
  3. Step 3: Cross multiply
    1,048.31x = 1,446 × 674.66
  4. Step 4: Simplify right side
    1,048.31x = 975,551.13
  5. Step 5: Solve for x
    x = 975,551.13/1,048.31
  6. Step 6: Final answer
    x = 930.60

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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.