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Finding the Fourth Proportional to 497,020.86, 685,891.54 and 279,238.72

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Solution

The fourth proportional to 497,020.86, 685,891.54 and 279,238.72 is: 385,350.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    497,020.86 : 685,891.54 = 279,238.72 : x
  2. Step 2: Convert to fraction form
    497,020.86/685,891.54 = 279,238.72/x
  3. Step 3: Cross multiply
    497,020.86x = 685,891.54 × 279,238.72
  4. Step 4: Simplify right side
    497,020.86x = 191,527,472,894.37
  5. Step 5: Solve for x
    x = 191,527,472,894.37/497,020.86
  6. Step 6: Final answer
    x = 385,350.97

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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.