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Finding the Fourth Proportional to 714.18, 984.98 and 697.28

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Solution

The fourth proportional to 714.18, 984.98 and 697.28 is: 961.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.18 : 984.98 = 697.28 : x
  2. Step 2: Convert to fraction form
    714.18/984.98 = 697.28/x
  3. Step 3: Cross multiply
    714.18x = 984.98 × 697.28
  4. Step 4: Simplify right side
    714.18x = 686,798.44
  5. Step 5: Solve for x
    x = 686,798.44/714.18
  6. Step 6: Final answer
    x = 961.66

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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.