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Finding the Fourth Proportional to 199,385,909.40, 279,543,381 and 199,385,909.40

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Solution

The fourth proportional to 199,385,909.40, 279,543,381 and 199,385,909.40 is: 279,543,381

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,385,909.40 : 279,543,381 = 199,385,909.40 : x
  2. Step 2: Convert to fraction form
    199,385,909.40/279,543,381 = 199,385,909.40/x
  3. Step 3: Cross multiply
    199,385,909.40x = 279,543,381 × 199,385,909.40
  4. Step 4: Simplify right side
    199,385,909.40x = 55,737,011,237,435,680
  5. Step 5: Solve for x
    x = 55,737,011,237,435,680/199,385,909.40
  6. Step 6: Final answer
    x = 279,543,381

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.