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Finding the Fourth Proportional to 636,236.19, 878,022.74 and 345,867.28

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Solution

The fourth proportional to 636,236.19, 878,022.74 and 345,867.28 is: 477,305.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,236.19 : 878,022.74 = 345,867.28 : x
  2. Step 2: Convert to fraction form
    636,236.19/878,022.74 = 345,867.28/x
  3. Step 3: Cross multiply
    636,236.19x = 878,022.74 × 345,867.28
  4. Step 4: Simplify right side
    636,236.19x = 303,679,336,861.95
  5. Step 5: Solve for x
    x = 303,679,336,861.95/636,236.19
  6. Step 6: Final answer
    x = 477,305.98

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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.