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Finding the Fourth Proportional to 516,490.56, 712,756.40 and 287,040.65

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Solution

The fourth proportional to 516,490.56, 712,756.40 and 287,040.65 is: 396,115.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,490.56 : 712,756.40 = 287,040.65 : x
  2. Step 2: Convert to fraction form
    516,490.56/712,756.40 = 287,040.65/x
  3. Step 3: Cross multiply
    516,490.56x = 712,756.40 × 287,040.65
  4. Step 4: Simplify right side
    516,490.56x = 204,590,055,348.68
  5. Step 5: Solve for x
    x = 204,590,055,348.68/516,490.56
  6. Step 6: Final answer
    x = 396,115.77

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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.