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Finding the Fourth Proportional to 342,139.80, 512,620.56 and 242,135.40

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Solution

The fourth proportional to 342,139.80, 512,620.56 and 242,135.40 is: 362,786.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,139.80 : 512,620.56 = 242,135.40 : x
  2. Step 2: Convert to fraction form
    342,139.80/512,620.56 = 242,135.40/x
  3. Step 3: Cross multiply
    342,139.80x = 512,620.56 × 242,135.40
  4. Step 4: Simplify right side
    342,139.80x = 124,123,584,343.82
  5. Step 5: Solve for x
    x = 124,123,584,343.82/342,139.80
  6. Step 6: Final answer
    x = 362,786.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.