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Finding the Fourth Proportional to 326,077.20, 489,115.80 and 247,345.20

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Solution

The fourth proportional to 326,077.20, 489,115.80 and 247,345.20 is: 371,017.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,077.20 : 489,115.80 = 247,345.20 : x
  2. Step 2: Convert to fraction form
    326,077.20/489,115.80 = 247,345.20/x
  3. Step 3: Cross multiply
    326,077.20x = 489,115.80 × 247,345.20
  4. Step 4: Simplify right side
    326,077.20x = 120,980,445,374.16
  5. Step 5: Solve for x
    x = 120,980,445,374.16/326,077.20
  6. Step 6: Final answer
    x = 371,017.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.