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Finding the Fourth Proportional to 627.69, 866.20 and 347.92

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Solution

The fourth proportional to 627.69, 866.20 and 347.92 is: 480.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.69 : 866.20 = 347.92 : x
  2. Step 2: Convert to fraction form
    627.69/866.20 = 347.92/x
  3. Step 3: Cross multiply
    627.69x = 866.20 × 347.92
  4. Step 4: Simplify right side
    627.69x = 301,367.38
  5. Step 5: Solve for x
    x = 301,367.38/627.69
  6. Step 6: Final answer
    x = 480.12

Related Problems

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Half scale
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Double scale
Find fourth proportional to 628.69, 867.58 and 348.92
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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.