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Finding the Fourth Proportional to 901.12, 1,350.94 and 388.48

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Solution

The fourth proportional to 901.12, 1,350.94 and 388.48 is: 582.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.12 : 1,350.94 = 388.48 : x
  2. Step 2: Convert to fraction form
    901.12/1,350.94 = 388.48/x
  3. Step 3: Cross multiply
    901.12x = 1,350.94 × 388.48
  4. Step 4: Simplify right side
    901.12x = 524,813.17
  5. Step 5: Solve for x
    x = 524,813.17/901.12
  6. Step 6: Final answer
    x = 582.40

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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.