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Finding the Fourth Proportional to 714.28, 986.39 and 675.46

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Solution

The fourth proportional to 714.28, 986.39 and 675.46 is: 932.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.28 : 986.39 = 675.46 : x
  2. Step 2: Convert to fraction form
    714.28/986.39 = 675.46/x
  3. Step 3: Cross multiply
    714.28x = 986.39 × 675.46
  4. Step 4: Simplify right side
    714.28x = 666,263.61
  5. Step 5: Solve for x
    x = 666,263.61/714.28
  6. Step 6: Final answer
    x = 932.77

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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.