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Finding the Fourth Proportional to 701.40, 1,055.80 and 634.40

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Solution

The fourth proportional to 701.40, 1,055.80 and 634.40 is: 954.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.40 : 1,055.80 = 634.40 : x
  2. Step 2: Convert to fraction form
    701.40/1,055.80 = 634.40/x
  3. Step 3: Cross multiply
    701.40x = 1,055.80 × 634.40
  4. Step 4: Simplify right side
    701.40x = 669,799.52
  5. Step 5: Solve for x
    x = 669,799.52/701.40
  6. Step 6: Final answer
    x = 954.95

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.