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Finding the Fourth Proportional to 901.32, 1,243.68 and 547.64

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Solution

The fourth proportional to 901.32, 1,243.68 and 547.64 is: 755.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.32 : 1,243.68 = 547.64 : x
  2. Step 2: Convert to fraction form
    901.32/1,243.68 = 547.64/x
  3. Step 3: Cross multiply
    901.32x = 1,243.68 × 547.64
  4. Step 4: Simplify right side
    901.32x = 681,088.92
  5. Step 5: Solve for x
    x = 681,088.92/901.32
  6. Step 6: Final answer
    x = 755.66

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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.