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Finding the Fourth Proportional to 391,625.92, 540,443.10 and 238,664.80

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Solution

The fourth proportional to 391,625.92, 540,443.10 and 238,664.80 is: 329,357.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,625.92 : 540,443.10 = 238,664.80 : x
  2. Step 2: Convert to fraction form
    391,625.92/540,443.10 = 238,664.80/x
  3. Step 3: Cross multiply
    391,625.92x = 540,443.10 × 238,664.80
  4. Step 4: Simplify right side
    391,625.92x = 128,984,744,372.88
  5. Step 5: Solve for x
    x = 128,984,744,372.88/391,625.92
  6. Step 6: Final answer
    x = 329,357.02

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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.