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Finding the Fourth Proportional to 901.15, 1,351.73 and 786.13

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Solution

The fourth proportional to 901.15, 1,351.73 and 786.13 is: 1,179.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.15 : 1,351.73 = 786.13 : x
  2. Step 2: Convert to fraction form
    901.15/1,351.73 = 786.13/x
  3. Step 3: Cross multiply
    901.15x = 1,351.73 × 786.13
  4. Step 4: Simplify right side
    901.15x = 1,062,635.50
  5. Step 5: Solve for x
    x = 1,062,635.50/901.15
  6. Step 6: Final answer
    x = 1,179.20

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.