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Finding the Fourth Proportional to 491,360.58, 678,022.65 and 276,574.50

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Solution

The fourth proportional to 491,360.58, 678,022.65 and 276,574.50 is: 381,641.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,360.58 : 678,022.65 = 276,574.50 : x
  2. Step 2: Convert to fraction form
    491,360.58/678,022.65 = 276,574.50/x
  3. Step 3: Cross multiply
    491,360.58x = 678,022.65 × 276,574.50
  4. Step 4: Simplify right side
    491,360.58x = 187,523,775,412.43
  5. Step 5: Solve for x
    x = 187,523,775,412.43/491,360.58
  6. Step 6: Final answer
    x = 381,641.88

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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.