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Finding the Fourth Proportional to 247,974.16, 342,345 and 189,721.40

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Solution

The fourth proportional to 247,974.16, 342,345 and 189,721.40 is: 261,923.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,974.16 : 342,345 = 189,721.40 : x
  2. Step 2: Convert to fraction form
    247,974.16/342,345 = 189,721.40/x
  3. Step 3: Cross multiply
    247,974.16x = 342,345 × 189,721.40
  4. Step 4: Simplify right side
    247,974.16x = 64,950,172,683
  5. Step 5: Solve for x
    x = 64,950,172,683/247,974.16
  6. Step 6: Final answer
    x = 261,923.15

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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.