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Finding the Fourth Proportional to 391,424.78, 540,157.04 and 230,290.20

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Solution

The fourth proportional to 391,424.78, 540,157.04 and 230,290.20 is: 317,795.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,424.78 : 540,157.04 = 230,290.20 : x
  2. Step 2: Convert to fraction form
    391,424.78/540,157.04 = 230,290.20/x
  3. Step 3: Cross multiply
    391,424.78x = 540,157.04 × 230,290.20
  4. Step 4: Simplify right side
    391,424.78x = 124,392,873,348.73
  5. Step 5: Solve for x
    x = 124,392,873,348.73/391,424.78
  6. Step 6: Final answer
    x = 317,795.09

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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.