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Finding the Fourth Proportional to 491,296.70, 678,002.68 and 276,444.38

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Solution

The fourth proportional to 491,296.70, 678,002.68 and 276,444.38 is: 381,500.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,296.70 : 678,002.68 = 276,444.38 : x
  2. Step 2: Convert to fraction form
    491,296.70/678,002.68 = 276,444.38/x
  3. Step 3: Cross multiply
    491,296.70x = 678,002.68 × 276,444.38
  4. Step 4: Simplify right side
    491,296.70x = 187,430,030,510.94
  5. Step 5: Solve for x
    x = 187,430,030,510.94/491,296.70
  6. Step 6: Final answer
    x = 381,500.69

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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.