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Finding the Fourth Proportional to 642.83, 962.70 and 627.33

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Solution

The fourth proportional to 642.83, 962.70 and 627.33 is: 939.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.83 : 962.70 = 627.33 : x
  2. Step 2: Convert to fraction form
    642.83/962.70 = 627.33/x
  3. Step 3: Cross multiply
    642.83x = 962.70 × 627.33
  4. Step 4: Simplify right side
    642.83x = 603,930.59
  5. Step 5: Solve for x
    x = 603,930.59/642.83
  6. Step 6: Final answer
    x = 939.49

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Double scale
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1.5x scale

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.