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Finding the Fourth Proportional to 714.39, 985.86 and 434.87

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Solution

The fourth proportional to 714.39, 985.86 and 434.87 is: 600.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.39 : 985.86 = 434.87 : x
  2. Step 2: Convert to fraction form
    714.39/985.86 = 434.87/x
  3. Step 3: Cross multiply
    714.39x = 985.86 × 434.87
  4. Step 4: Simplify right side
    714.39x = 428,716.01
  5. Step 5: Solve for x
    x = 428,716.01/714.39
  6. Step 6: Final answer
    x = 600.11

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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.