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Finding the Fourth Proportional to 963.75, 1,445.70 and 347.55

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Solution

The fourth proportional to 963.75, 1,445.70 and 347.55 is: 521.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.75 : 1,445.70 = 347.55 : x
  2. Step 2: Convert to fraction form
    963.75/1,445.70 = 347.55/x
  3. Step 3: Cross multiply
    963.75x = 1,445.70 × 347.55
  4. Step 4: Simplify right side
    963.75x = 502,453.04
  5. Step 5: Solve for x
    x = 502,453.04/963.75
  6. Step 6: Final answer
    x = 521.35

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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.