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Finding the Fourth Proportional to 758.95, 1,043.56 and 648.23

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Solution

The fourth proportional to 758.95, 1,043.56 and 648.23 is: 891.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.95 : 1,043.56 = 648.23 : x
  2. Step 2: Convert to fraction form
    758.95/1,043.56 = 648.23/x
  3. Step 3: Cross multiply
    758.95x = 1,043.56 × 648.23
  4. Step 4: Simplify right side
    758.95x = 676,462.49
  5. Step 5: Solve for x
    x = 676,462.49/758.95
  6. Step 6: Final answer
    x = 891.32

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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.