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Finding the Fourth Proportional to 900.31, 1,350.35 and 352.87

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Solution

The fourth proportional to 900.31, 1,350.35 and 352.87 is: 529.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.31 : 1,350.35 = 352.87 : x
  2. Step 2: Convert to fraction form
    900.31/1,350.35 = 352.87/x
  3. Step 3: Cross multiply
    900.31x = 1,350.35 × 352.87
  4. Step 4: Simplify right side
    900.31x = 476,500.79
  5. Step 5: Solve for x
    x = 476,500.79/900.31
  6. Step 6: Final answer
    x = 529.27

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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.