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Finding the Fourth Proportional to 963.75, 1,330 and 590.72

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Solution

The fourth proportional to 963.75, 1,330 and 590.72 is: 815.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.75 : 1,330 = 590.72 : x
  2. Step 2: Convert to fraction form
    963.75/1,330 = 590.72/x
  3. Step 3: Cross multiply
    963.75x = 1,330 × 590.72
  4. Step 4: Simplify right side
    963.75x = 785,657.60
  5. Step 5: Solve for x
    x = 785,657.60/963.75
  6. Step 6: Final answer
    x = 815.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.