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Finding the Fourth Proportional to 963.74, 1,445.75 and 415.91

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Solution

The fourth proportional to 963.74, 1,445.75 and 415.91 is: 623.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.74 : 1,445.75 = 415.91 : x
  2. Step 2: Convert to fraction form
    963.74/1,445.75 = 415.91/x
  3. Step 3: Cross multiply
    963.74x = 1,445.75 × 415.91
  4. Step 4: Simplify right side
    963.74x = 601,301.88
  5. Step 5: Solve for x
    x = 601,301.88/963.74
  6. Step 6: Final answer
    x = 623.93

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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.