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Finding the Fourth Proportional to 323,980.20, 485,967.42 and 87,303.24

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Solution

The fourth proportional to 323,980.20, 485,967.42 and 87,303.24 is: 130,954.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,980.20 : 485,967.42 = 87,303.24 : x
  2. Step 2: Convert to fraction form
    323,980.20/485,967.42 = 87,303.24/x
  3. Step 3: Cross multiply
    323,980.20x = 485,967.42 × 87,303.24
  4. Step 4: Simplify right side
    323,980.20x = 42,426,530,300.44
  5. Step 5: Solve for x
    x = 42,426,530,300.44/323,980.20
  6. Step 6: Final answer
    x = 130,954.08

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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.