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Finding the Fourth Proportional to 547.70, 823.58 and 458.60

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Solution

The fourth proportional to 547.70, 823.58 and 458.60 is: 689.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.70 : 823.58 = 458.60 : x
  2. Step 2: Convert to fraction form
    547.70/823.58 = 458.60/x
  3. Step 3: Cross multiply
    547.70x = 823.58 × 458.60
  4. Step 4: Simplify right side
    547.70x = 377,691.50
  5. Step 5: Solve for x
    x = 377,691.50/547.70
  6. Step 6: Final answer
    x = 689.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.