Home / 1,206.15-1,809.40-547.66

Finding the Fourth Proportional to 1,206.15, 1,809.40 and 547.66

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Solution

The fourth proportional to 1,206.15, 1,809.40 and 547.66 is: 821.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.15 : 1,809.40 = 547.66 : x
  2. Step 2: Convert to fraction form
    1,206.15/1,809.40 = 547.66/x
  3. Step 3: Cross multiply
    1,206.15x = 1,809.40 × 547.66
  4. Step 4: Simplify right side
    1,206.15x = 990,938.69
  5. Step 5: Solve for x
    x = 990,938.69/1,206.15
  6. Step 6: Final answer
    x = 821.57

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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.