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Finding the Fourth Proportional to 714.60, 986.22 and 434.85

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Solution

The fourth proportional to 714.60, 986.22 and 434.85 is: 600.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.60 : 986.22 = 434.85 : x
  2. Step 2: Convert to fraction form
    714.60/986.22 = 434.85/x
  3. Step 3: Cross multiply
    714.60x = 986.22 × 434.85
  4. Step 4: Simplify right side
    714.60x = 428,858.39
  5. Step 5: Solve for x
    x = 428,858.39/714.60
  6. Step 6: Final answer
    x = 600.14

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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.