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Finding the Fourth Proportional to 438,980, 605,818.32 and 247,988.48

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Solution

The fourth proportional to 438,980, 605,818.32 and 247,988.48 is: 342,238.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,980 : 605,818.32 = 247,988.48 : x
  2. Step 2: Convert to fraction form
    438,980/605,818.32 = 247,988.48/x
  3. Step 3: Cross multiply
    438,980x = 605,818.32 × 247,988.48
  4. Step 4: Simplify right side
    438,980x = 150,235,964,332.95
  5. Step 5: Solve for x
    x = 150,235,964,332.95/438,980
  6. Step 6: Final answer
    x = 342,238.75

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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.