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Finding the Fourth Proportional to 491,452.93, 678,131.89 and 276,580.18

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Solution

The fourth proportional to 491,452.93, 678,131.89 and 276,580.18 is: 381,639.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,452.93 : 678,131.89 = 276,580.18 : x
  2. Step 2: Convert to fraction form
    491,452.93/678,131.89 = 276,580.18/x
  3. Step 3: Cross multiply
    491,452.93x = 678,131.89 × 276,580.18
  4. Step 4: Simplify right side
    491,452.93x = 187,557,840,199.94
  5. Step 5: Solve for x
    x = 187,557,840,199.94/491,452.93
  6. Step 6: Final answer
    x = 381,639.48

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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.