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Finding the Fourth Proportional to 323,437.60, 485,079.42 and 143,424.28

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Solution

The fourth proportional to 323,437.60, 485,079.42 and 143,424.28 is: 215,102.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,437.60 : 485,079.42 = 143,424.28 : x
  2. Step 2: Convert to fraction form
    323,437.60/485,079.42 = 143,424.28/x
  3. Step 3: Cross multiply
    323,437.60x = 485,079.42 × 143,424.28
  4. Step 4: Simplify right side
    323,437.60x = 69,572,166,556.32
  5. Step 5: Solve for x
    x = 69,572,166,556.32/323,437.60
  6. Step 6: Final answer
    x = 215,102.28

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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.