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Finding the Fourth Proportional to 887.26, 1,331.02 and 645.60

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Solution

The fourth proportional to 887.26, 1,331.02 and 645.60 is: 968.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.26 : 1,331.02 = 645.60 : x
  2. Step 2: Convert to fraction form
    887.26/1,331.02 = 645.60/x
  3. Step 3: Cross multiply
    887.26x = 1,331.02 × 645.60
  4. Step 4: Simplify right side
    887.26x = 859,306.51
  5. Step 5: Solve for x
    x = 859,306.51/887.26
  6. Step 6: Final answer
    x = 968.49

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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.