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Finding the Fourth Proportional to 839.75, 1,259.19 and 377.13

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Solution

The fourth proportional to 839.75, 1,259.19 and 377.13 is: 565.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.75 : 1,259.19 = 377.13 : x
  2. Step 2: Convert to fraction form
    839.75/1,259.19 = 377.13/x
  3. Step 3: Cross multiply
    839.75x = 1,259.19 × 377.13
  4. Step 4: Simplify right side
    839.75x = 474,876.91
  5. Step 5: Solve for x
    x = 474,876.91/839.75
  6. Step 6: Final answer
    x = 565.50

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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.