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Finding the Fourth Proportional to 385,471.16, 578,182.11 and 119,209.37

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Solution

The fourth proportional to 385,471.16, 578,182.11 and 119,209.37 is: 178,806.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,471.16 : 578,182.11 = 119,209.37 : x
  2. Step 2: Convert to fraction form
    385,471.16/578,182.11 = 119,209.37/x
  3. Step 3: Cross multiply
    385,471.16x = 578,182.11 × 119,209.37
  4. Step 4: Simplify right side
    385,471.16x = 68,924,726,076.79
  5. Step 5: Solve for x
    x = 68,924,726,076.79/385,471.16
  6. Step 6: Final answer
    x = 178,806.44

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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.