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Finding the Fourth Proportional to 438,954.70, 605,806.65 and 247,980.40

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Solution

The fourth proportional to 438,954.70, 605,806.65 and 247,980.40 is: 342,240.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,954.70 : 605,806.65 = 247,980.40 : x
  2. Step 2: Convert to fraction form
    438,954.70/605,806.65 = 247,980.40/x
  3. Step 3: Cross multiply
    438,954.70x = 605,806.65 × 247,980.40
  4. Step 4: Simplify right side
    438,954.70x = 150,228,175,389.66
  5. Step 5: Solve for x
    x = 150,228,175,389.66/438,954.70
  6. Step 6: Final answer
    x = 342,240.73

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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.