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Finding the Fourth Proportional to 279,584.80, 385,813.30 and 158,709.90

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Solution

The fourth proportional to 279,584.80, 385,813.30 and 158,709.90 is: 219,011.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,584.80 : 385,813.30 = 158,709.90 : x
  2. Step 2: Convert to fraction form
    279,584.80/385,813.30 = 158,709.90/x
  3. Step 3: Cross multiply
    279,584.80x = 385,813.30 × 158,709.90
  4. Step 4: Simplify right side
    279,584.80x = 61,232,390,261.67
  5. Step 5: Solve for x
    x = 61,232,390,261.67/279,584.80
  6. Step 6: Final answer
    x = 219,011.87

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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.