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Finding the Fourth Proportional to 963.89, 1,445.56 and 270.51

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Solution

The fourth proportional to 963.89, 1,445.56 and 270.51 is: 405.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.89 : 1,445.56 = 270.51 : x
  2. Step 2: Convert to fraction form
    963.89/1,445.56 = 270.51/x
  3. Step 3: Cross multiply
    963.89x = 1,445.56 × 270.51
  4. Step 4: Simplify right side
    963.89x = 391,038.44
  5. Step 5: Solve for x
    x = 391,038.44/963.89
  6. Step 6: Final answer
    x = 405.69

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Double scale
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1.5x scale

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.