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Finding the Fourth Proportional to 714.75, 986.54 and 404.43

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Solution

The fourth proportional to 714.75, 986.54 and 404.43 is: 558.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.75 : 986.54 = 404.43 : x
  2. Step 2: Convert to fraction form
    714.75/986.54 = 404.43/x
  3. Step 3: Cross multiply
    714.75x = 986.54 × 404.43
  4. Step 4: Simplify right side
    714.75x = 398,984.35
  5. Step 5: Solve for x
    x = 398,984.35/714.75
  6. Step 6: Final answer
    x = 558.22

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Double scale
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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.