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Finding the Fourth Proportional to 1,206.74, 1,809.90 and 476.84

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Solution

The fourth proportional to 1,206.74, 1,809.90 and 476.84 is: 715.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.74 : 1,809.90 = 476.84 : x
  2. Step 2: Convert to fraction form
    1,206.74/1,809.90 = 476.84/x
  3. Step 3: Cross multiply
    1,206.74x = 1,809.90 × 476.84
  4. Step 4: Simplify right side
    1,206.74x = 863,032.72
  5. Step 5: Solve for x
    x = 863,032.72/1,206.74
  6. Step 6: Final answer
    x = 715.18

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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.