Home / 1,811.16-2,715.93-1,118.61

Finding the Fourth Proportional to 1,811.16, 2,715.93 and 1,118.61

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Solution

The fourth proportional to 1,811.16, 2,715.93 and 1,118.61 is: 1,677.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.16 : 2,715.93 = 1,118.61 : x
  2. Step 2: Convert to fraction form
    1,811.16/2,715.93 = 1,118.61/x
  3. Step 3: Cross multiply
    1,811.16x = 2,715.93 × 1,118.61
  4. Step 4: Simplify right side
    1,811.16x = 3,038,066.46
  5. Step 5: Solve for x
    x = 3,038,066.46/1,811.16
  6. Step 6: Final answer
    x = 1,677.41

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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.