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Finding the Fourth Proportional to 279,364.73, 385,563.96 and 156,870.86

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Solution

The fourth proportional to 279,364.73, 385,563.96 and 156,870.86 is: 216,504.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,364.73 : 385,563.96 = 156,870.86 : x
  2. Step 2: Convert to fraction form
    279,364.73/385,563.96 = 156,870.86/x
  3. Step 3: Cross multiply
    279,364.73x = 385,563.96 × 156,870.86
  4. Step 4: Simplify right side
    279,364.73x = 60,483,750,954.12
  5. Step 5: Solve for x
    x = 60,483,750,954.12/279,364.73
  6. Step 6: Final answer
    x = 216,504.60

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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.