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Finding the Fourth Proportional to 559,138.30, 838,707.45 and 259,519.30

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Solution

The fourth proportional to 559,138.30, 838,707.45 and 259,519.30 is: 389,278.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,138.30 : 838,707.45 = 259,519.30 : x
  2. Step 2: Convert to fraction form
    559,138.30/838,707.45 = 259,519.30/x
  3. Step 3: Cross multiply
    559,138.30x = 838,707.45 × 259,519.30
  4. Step 4: Simplify right side
    559,138.30x = 217,660,770,328.79
  5. Step 5: Solve for x
    x = 217,660,770,328.79/559,138.30
  6. Step 6: Final answer
    x = 389,278.95

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Double scale
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Similar ratio
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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.