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Finding the Fourth Proportional to 309,257.68, 426,522.57 and 217,680.12

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Solution

The fourth proportional to 309,257.68, 426,522.57 and 217,680.12 is: 300,220.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,257.68 : 426,522.57 = 217,680.12 : x
  2. Step 2: Convert to fraction form
    309,257.68/426,522.57 = 217,680.12/x
  3. Step 3: Cross multiply
    309,257.68x = 426,522.57 × 217,680.12
  4. Step 4: Simplify right side
    309,257.68x = 92,845,484,856.10
  5. Step 5: Solve for x
    x = 92,845,484,856.10/309,257.68
  6. Step 6: Final answer
    x = 300,220.47

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1.5x scale

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.