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Finding the Fourth Proportional to 963.60, 1,445.19 and 347.31

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Solution

The fourth proportional to 963.60, 1,445.19 and 347.31 is: 520.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.60 : 1,445.19 = 347.31 : x
  2. Step 2: Convert to fraction form
    963.60/1,445.19 = 347.31/x
  3. Step 3: Cross multiply
    963.60x = 1,445.19 × 347.31
  4. Step 4: Simplify right side
    963.60x = 501,928.94
  5. Step 5: Solve for x
    x = 501,928.94/963.60
  6. Step 6: Final answer
    x = 520.89

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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.