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Finding the Fourth Proportional to 491,440.78, 678,210.10 and 276,594.76

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Solution

The fourth proportional to 491,440.78, 678,210.10 and 276,594.76 is: 381,713.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,440.78 : 678,210.10 = 276,594.76 : x
  2. Step 2: Convert to fraction form
    491,440.78/678,210.10 = 276,594.76/x
  3. Step 3: Cross multiply
    491,440.78x = 678,210.10 × 276,594.76
  4. Step 4: Simplify right side
    491,440.78x = 187,589,361,880.35
  5. Step 5: Solve for x
    x = 187,589,361,880.35/491,440.78
  6. Step 6: Final answer
    x = 381,713.05

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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.