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Finding the Fourth Proportional to 1,206.60, 1,808.78 and 476.70

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Solution

The fourth proportional to 1,206.60, 1,808.78 and 476.70 is: 714.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.60 : 1,808.78 = 476.70 : x
  2. Step 2: Convert to fraction form
    1,206.60/1,808.78 = 476.70/x
  3. Step 3: Cross multiply
    1,206.60x = 1,808.78 × 476.70
  4. Step 4: Simplify right side
    1,206.60x = 862,245.43
  5. Step 5: Solve for x
    x = 862,245.43/1,206.60
  6. Step 6: Final answer
    x = 714.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.