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Finding the Fourth Proportional to 309,531.89, 427,330.98 and 236,800.78

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Solution

The fourth proportional to 309,531.89, 427,330.98 and 236,800.78 is: 326,920.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,531.89 : 427,330.98 = 236,800.78 : x
  2. Step 2: Convert to fraction form
    309,531.89/427,330.98 = 236,800.78/x
  3. Step 3: Cross multiply
    309,531.89x = 427,330.98 × 236,800.78
  4. Step 4: Simplify right side
    309,531.89x = 101,192,309,382.16
  5. Step 5: Solve for x
    x = 101,192,309,382.16/309,531.89
  6. Step 6: Final answer
    x = 326,920.46

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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.