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Finding the Fourth Proportional to 323,540.80, 485,312.40 and 98,900.36

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Solution

The fourth proportional to 323,540.80, 485,312.40 and 98,900.36 is: 148,350.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,540.80 : 485,312.40 = 98,900.36 : x
  2. Step 2: Convert to fraction form
    323,540.80/485,312.40 = 98,900.36/x
  3. Step 3: Cross multiply
    323,540.80x = 485,312.40 × 98,900.36
  4. Step 4: Simplify right side
    323,540.80x = 47,997,570,577.96
  5. Step 5: Solve for x
    x = 47,997,570,577.96/323,540.80
  6. Step 6: Final answer
    x = 148,350.91

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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.