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Finding the Fourth Proportional to 279,639.36, 385,770.29 and 189,026.91

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Solution

The fourth proportional to 279,639.36, 385,770.29 and 189,026.91 is: 260,767.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,639.36 : 385,770.29 = 189,026.91 : x
  2. Step 2: Convert to fraction form
    279,639.36/385,770.29 = 189,026.91/x
  3. Step 3: Cross multiply
    279,639.36x = 385,770.29 × 189,026.91
  4. Step 4: Simplify right side
    279,639.36x = 72,920,964,943.37
  5. Step 5: Solve for x
    x = 72,920,964,943.37/279,639.36
  6. Step 6: Final answer
    x = 260,767.89

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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.