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Finding the Fourth Proportional to 908.26, 1,253.28 and 535.30

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Solution

The fourth proportional to 908.26, 1,253.28 and 535.30 is: 738.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.26 : 1,253.28 = 535.30 : x
  2. Step 2: Convert to fraction form
    908.26/1,253.28 = 535.30/x
  3. Step 3: Cross multiply
    908.26x = 1,253.28 × 535.30
  4. Step 4: Simplify right side
    908.26x = 670,880.78
  5. Step 5: Solve for x
    x = 670,880.78/908.26
  6. Step 6: Final answer
    x = 738.64

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Double scale
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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.