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Finding the Fourth Proportional to 976.66, 1,347.84 and 714.22

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Solution

The fourth proportional to 976.66, 1,347.84 and 714.22 is: 985.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.66 : 1,347.84 = 714.22 : x
  2. Step 2: Convert to fraction form
    976.66/1,347.84 = 714.22/x
  3. Step 3: Cross multiply
    976.66x = 1,347.84 × 714.22
  4. Step 4: Simplify right side
    976.66x = 962,654.28
  5. Step 5: Solve for x
    x = 962,654.28/976.66
  6. Step 6: Final answer
    x = 985.66

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1.5x scale

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.