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Finding the Fourth Proportional to 901.35, 1,243.91 and 528.19

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Solution

The fourth proportional to 901.35, 1,243.91 and 528.19 is: 728.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.35 : 1,243.91 = 528.19 : x
  2. Step 2: Convert to fraction form
    901.35/1,243.91 = 528.19/x
  3. Step 3: Cross multiply
    901.35x = 1,243.91 × 528.19
  4. Step 4: Simplify right side
    901.35x = 657,019.69
  5. Step 5: Solve for x
    x = 657,019.69/901.35
  6. Step 6: Final answer
    x = 728.93

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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.