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Finding the Fourth Proportional to 901.32, 1,243.92 and 845.70

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Solution

The fourth proportional to 901.32, 1,243.92 and 845.70 is: 1,167.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.32 : 1,243.92 = 845.70 : x
  2. Step 2: Convert to fraction form
    901.32/1,243.92 = 845.70/x
  3. Step 3: Cross multiply
    901.32x = 1,243.92 × 845.70
  4. Step 4: Simplify right side
    901.32x = 1,051,983.14
  5. Step 5: Solve for x
    x = 1,051,983.14/901.32
  6. Step 6: Final answer
    x = 1,167.16

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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.