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Finding the Fourth Proportional to 968.91, 1,445.88 and 865.08

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Solution

The fourth proportional to 968.91, 1,445.88 and 865.08 is: 1,290.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.91 : 1,445.88 = 865.08 : x
  2. Step 2: Convert to fraction form
    968.91/1,445.88 = 865.08/x
  3. Step 3: Cross multiply
    968.91x = 1,445.88 × 865.08
  4. Step 4: Simplify right side
    968.91x = 1,250,801.87
  5. Step 5: Solve for x
    x = 1,250,801.87/968.91
  6. Step 6: Final answer
    x = 1,290.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.