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Finding the Fourth Proportional to 908.30, 1,253.44 and 535.22

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Solution

The fourth proportional to 908.30, 1,253.44 and 535.22 is: 738.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.30 : 1,253.44 = 535.22 : x
  2. Step 2: Convert to fraction form
    908.30/1,253.44 = 535.22/x
  3. Step 3: Cross multiply
    908.30x = 1,253.44 × 535.22
  4. Step 4: Simplify right side
    908.30x = 670,866.16
  5. Step 5: Solve for x
    x = 670,866.16/908.30
  6. Step 6: Final answer
    x = 738.60

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Half scale
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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.