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Finding the Fourth Proportional to 627.19, 865.48 and 347.43

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Solution

The fourth proportional to 627.19, 865.48 and 347.43 is: 479.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.19 : 865.48 = 347.43 : x
  2. Step 2: Convert to fraction form
    627.19/865.48 = 347.43/x
  3. Step 3: Cross multiply
    627.19x = 865.48 × 347.43
  4. Step 4: Simplify right side
    627.19x = 300,693.72
  5. Step 5: Solve for x
    x = 300,693.72/627.19
  6. Step 6: Final answer
    x = 479.43

Related Problems

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Half scale
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Double scale
Find fourth proportional to 628.19, 866.86 and 348.43
Similar ratio
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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.