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Finding the Fourth Proportional to 518,804.28, 715,960.92 and 292,449.72

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Solution

The fourth proportional to 518,804.28, 715,960.92 and 292,449.72 is: 403,586.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,804.28 : 715,960.92 = 292,449.72 : x
  2. Step 2: Convert to fraction form
    518,804.28/715,960.92 = 292,449.72/x
  3. Step 3: Cross multiply
    518,804.28x = 715,960.92 × 292,449.72
  4. Step 4: Simplify right side
    518,804.28x = 209,382,570,584.94
  5. Step 5: Solve for x
    x = 209,382,570,584.94/518,804.28
  6. Step 6: Final answer
    x = 403,586.82

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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.