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Finding the Fourth Proportional to 491,448.64, 678,220.86 and 276,602.56

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Solution

The fourth proportional to 491,448.64, 678,220.86 and 276,602.56 is: 381,723.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,448.64 : 678,220.86 = 276,602.56 : x
  2. Step 2: Convert to fraction form
    491,448.64/678,220.86 = 276,602.56/x
  3. Step 3: Cross multiply
    491,448.64x = 678,220.86 × 276,602.56
  4. Step 4: Simplify right side
    491,448.64x = 187,597,626,121.40
  5. Step 5: Solve for x
    x = 187,597,626,121.40/491,448.64
  6. Step 6: Final answer
    x = 381,723.77

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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.