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Finding the Fourth Proportional to 1,010.98, 1,394.67 and 716.41

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Solution

The fourth proportional to 1,010.98, 1,394.67 and 716.41 is: 988.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.98 : 1,394.67 = 716.41 : x
  2. Step 2: Convert to fraction form
    1,010.98/1,394.67 = 716.41/x
  3. Step 3: Cross multiply
    1,010.98x = 1,394.67 × 716.41
  4. Step 4: Simplify right side
    1,010.98x = 999,155.53
  5. Step 5: Solve for x
    x = 999,155.53/1,010.98
  6. Step 6: Final answer
    x = 988.30

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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.