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Finding the Fourth Proportional to 491,445.60, 678,216.76 and 276,599.60

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Solution

The fourth proportional to 491,445.60, 678,216.76 and 276,599.60 is: 381,719.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,445.60 : 678,216.76 = 276,599.60 : x
  2. Step 2: Convert to fraction form
    491,445.60/678,216.76 = 276,599.60/x
  3. Step 3: Cross multiply
    491,445.60x = 678,216.76 × 276,599.60
  4. Step 4: Simplify right side
    491,445.60x = 187,594,484,529.30
  5. Step 5: Solve for x
    x = 187,594,484,529.30/491,445.60
  6. Step 6: Final answer
    x = 381,719.74

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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.