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Finding the Fourth Proportional to 279,423.72, 385,950.96 and 202,820.40

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Solution

The fourth proportional to 279,423.72, 385,950.96 and 202,820.40 is: 280,143.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,423.72 : 385,950.96 = 202,820.40 : x
  2. Step 2: Convert to fraction form
    279,423.72/385,950.96 = 202,820.40/x
  3. Step 3: Cross multiply
    279,423.72x = 385,950.96 × 202,820.40
  4. Step 4: Simplify right side
    279,423.72x = 78,278,728,087.58
  5. Step 5: Solve for x
    x = 78,278,728,087.58/279,423.72
  6. Step 6: Final answer
    x = 280,143.46

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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.