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Finding the Fourth Proportional to 279,289.27, 385,353.61 and 158,402.71

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Solution

The fourth proportional to 279,289.27, 385,353.61 and 158,402.71 is: 218,558.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,289.27 : 385,353.61 = 158,402.71 : x
  2. Step 2: Convert to fraction form
    279,289.27/385,353.61 = 158,402.71/x
  3. Step 3: Cross multiply
    279,289.27x = 385,353.61 × 158,402.71
  4. Step 4: Simplify right side
    279,289.27x = 61,041,056,132.28
  5. Step 5: Solve for x
    x = 61,041,056,132.28/279,289.27
  6. Step 6: Final answer
    x = 218,558.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.