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Finding the Fourth Proportional to 622.75, 858.90 and 483.29

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Solution

The fourth proportional to 622.75, 858.90 and 483.29 is: 666.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.75 : 858.90 = 483.29 : x
  2. Step 2: Convert to fraction form
    622.75/858.90 = 483.29/x
  3. Step 3: Cross multiply
    622.75x = 858.90 × 483.29
  4. Step 4: Simplify right side
    622.75x = 415,097.78
  5. Step 5: Solve for x
    x = 415,097.78/622.75
  6. Step 6: Final answer
    x = 666.56

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Find fourth proportional to 311.38, 429.45 and 241.65
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Double scale
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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.