Home / 1,117.11-1,674.52-808.20

Finding the Fourth Proportional to 1,117.11, 1,674.52 and 808.20

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Solution

The fourth proportional to 1,117.11, 1,674.52 and 808.20 is: 1,211.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.11 : 1,674.52 = 808.20 : x
  2. Step 2: Convert to fraction form
    1,117.11/1,674.52 = 808.20/x
  3. Step 3: Cross multiply
    1,117.11x = 1,674.52 × 808.20
  4. Step 4: Simplify right side
    1,117.11x = 1,353,345.04
  5. Step 5: Solve for x
    x = 1,353,345.04/1,117.11
  6. Step 6: Final answer
    x = 1,211.47

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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.