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Finding the Fourth Proportional to 491,365.92, 678,079.44 and 276,506.40

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Solution

The fourth proportional to 491,365.92, 678,079.44 and 276,506.40 is: 381,575.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,365.92 : 678,079.44 = 276,506.40 : x
  2. Step 2: Convert to fraction form
    491,365.92/678,079.44 = 276,506.40/x
  3. Step 3: Cross multiply
    491,365.92x = 678,079.44 × 276,506.40
  4. Step 4: Simplify right side
    491,365.92x = 187,493,304,868.42
  5. Step 5: Solve for x
    x = 187,493,304,868.42/491,365.92
  6. Step 6: Final answer
    x = 381,575.72

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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.