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Finding the Fourth Proportional to 323,621.84, 485,432.34 and 86,964.52

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Solution

The fourth proportional to 323,621.84, 485,432.34 and 86,964.52 is: 130,446.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,621.84 : 485,432.34 = 86,964.52 : x
  2. Step 2: Convert to fraction form
    323,621.84/485,432.34 = 86,964.52/x
  3. Step 3: Cross multiply
    323,621.84x = 485,432.34 × 86,964.52
  4. Step 4: Simplify right side
    323,621.84x = 42,215,390,440.58
  5. Step 5: Solve for x
    x = 42,215,390,440.58/323,621.84
  6. Step 6: Final answer
    x = 130,446.67

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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.