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Finding the Fourth Proportional to 963.78, 1,445.52 and 347.40

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Solution

The fourth proportional to 963.78, 1,445.52 and 347.40 is: 521.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.78 : 1,445.52 = 347.40 : x
  2. Step 2: Convert to fraction form
    963.78/1,445.52 = 347.40/x
  3. Step 3: Cross multiply
    963.78x = 1,445.52 × 347.40
  4. Step 4: Simplify right side
    963.78x = 502,173.65
  5. Step 5: Solve for x
    x = 502,173.65/963.78
  6. Step 6: Final answer
    x = 521.05

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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.