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Finding the Fourth Proportional to 426,019.60, 638,251.80 and 259,613.20

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Solution

The fourth proportional to 426,019.60, 638,251.80 and 259,613.20 is: 388,945.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,019.60 : 638,251.80 = 259,613.20 : x
  2. Step 2: Convert to fraction form
    426,019.60/638,251.80 = 259,613.20/x
  3. Step 3: Cross multiply
    426,019.60x = 638,251.80 × 259,613.20
  4. Step 4: Simplify right side
    426,019.60x = 165,698,592,203.76
  5. Step 5: Solve for x
    x = 165,698,592,203.76/426,019.60
  6. Step 6: Final answer
    x = 388,945.94

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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.