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Finding the Fourth Proportional to 491,506.89, 678,277.85 and 276,646.83

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Solution

The fourth proportional to 491,506.89, 678,277.85 and 276,646.83 is: 381,771.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,506.89 : 678,277.85 = 276,646.83 : x
  2. Step 2: Convert to fraction form
    491,506.89/678,277.85 = 276,646.83/x
  3. Step 3: Cross multiply
    491,506.89x = 678,277.85 × 276,646.83
  4. Step 4: Simplify right side
    491,506.89x = 187,643,415,678.48
  5. Step 5: Solve for x
    x = 187,643,415,678.48/491,506.89
  6. Step 6: Final answer
    x = 381,771.69

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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.