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Finding the Fourth Proportional to 482,859.72, 666,379.98 and 278,979.48

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Solution

The fourth proportional to 482,859.72, 666,379.98 and 278,979.48 is: 385,011.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,859.72 : 666,379.98 = 278,979.48 : x
  2. Step 2: Convert to fraction form
    482,859.72/666,379.98 = 278,979.48/x
  3. Step 3: Cross multiply
    482,859.72x = 666,379.98 × 278,979.48
  4. Step 4: Simplify right side
    482,859.72x = 185,906,340,302.81
  5. Step 5: Solve for x
    x = 185,906,340,302.81/482,859.72
  6. Step 6: Final answer
    x = 385,011.08

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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.