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Finding the Fourth Proportional to 279,182.87, 385,340.79 and 158,394.86

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Solution

The fourth proportional to 279,182.87, 385,340.79 and 158,394.86 is: 218,623.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,182.87 : 385,340.79 = 158,394.86 : x
  2. Step 2: Convert to fraction form
    279,182.87/385,340.79 = 158,394.86/x
  3. Step 3: Cross multiply
    279,182.87x = 385,340.79 × 158,394.86
  4. Step 4: Simplify right side
    279,182.87x = 61,036,000,484.34
  5. Step 5: Solve for x
    x = 61,036,000,484.34/279,182.87
  6. Step 6: Final answer
    x = 218,623.73

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1.5x scale

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.