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Finding the Fourth Proportional to 798.95, 1,101.75 and 710.15

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Solution

The fourth proportional to 798.95, 1,101.75 and 710.15 is: 979.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.95 : 1,101.75 = 710.15 : x
  2. Step 2: Convert to fraction form
    798.95/1,101.75 = 710.15/x
  3. Step 3: Cross multiply
    798.95x = 1,101.75 × 710.15
  4. Step 4: Simplify right side
    798.95x = 782,402.25
  5. Step 5: Solve for x
    x = 782,402.25/798.95
  6. Step 6: Final answer
    x = 979.29

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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.