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Finding the Fourth Proportional to 901.14, 1,243.38 and 528.11

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Solution

The fourth proportional to 901.14, 1,243.38 and 528.11 is: 728.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.14 : 1,243.38 = 528.11 : x
  2. Step 2: Convert to fraction form
    901.14/1,243.38 = 528.11/x
  3. Step 3: Cross multiply
    901.14x = 1,243.38 × 528.11
  4. Step 4: Simplify right side
    901.14x = 656,635.19
  5. Step 5: Solve for x
    x = 656,635.19/901.14
  6. Step 6: Final answer
    x = 728.67

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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.