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Finding the Fourth Proportional to 323,259.12, 485,054.78 and 143,467.74

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Solution

The fourth proportional to 323,259.12, 485,054.78 and 143,467.74 is: 215,275.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,259.12 : 485,054.78 = 143,467.74 : x
  2. Step 2: Convert to fraction form
    323,259.12/485,054.78 = 143,467.74/x
  3. Step 3: Cross multiply
    323,259.12x = 485,054.78 × 143,467.74
  4. Step 4: Simplify right side
    323,259.12x = 69,589,712,345.46
  5. Step 5: Solve for x
    x = 69,589,712,345.46/323,259.12
  6. Step 6: Final answer
    x = 215,275.33

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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.