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Finding the Fourth Proportional to 391,427.78, 540,161.18 and 230,293.20

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Solution

The fourth proportional to 391,427.78, 540,161.18 and 230,293.20 is: 317,799.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,427.78 : 540,161.18 = 230,293.20 : x
  2. Step 2: Convert to fraction form
    391,427.78/540,161.18 = 230,293.20/x
  3. Step 3: Cross multiply
    391,427.78x = 540,161.18 × 230,293.20
  4. Step 4: Simplify right side
    391,427.78x = 124,395,446,657.98
  5. Step 5: Solve for x
    x = 124,395,446,657.98/391,427.78
  6. Step 6: Final answer
    x = 317,799.23

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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.