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Finding the Fourth Proportional to 547,859.13, 756,031.50 and 306,143.69

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Solution

The fourth proportional to 547,859.13, 756,031.50 and 306,143.69 is: 422,470.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,859.13 : 756,031.50 = 306,143.69 : x
  2. Step 2: Convert to fraction form
    547,859.13/756,031.50 = 306,143.69/x
  3. Step 3: Cross multiply
    547,859.13x = 756,031.50 × 306,143.69
  4. Step 4: Simplify right side
    547,859.13x = 231,454,269,386.08
  5. Step 5: Solve for x
    x = 231,454,269,386.08/547,859.13
  6. Step 6: Final answer
    x = 422,470.41

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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.