Home / 1,312.18-1,811.69-1,171.84

Finding the Fourth Proportional to 1,312.18, 1,811.69 and 1,171.84

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Solution

The fourth proportional to 1,312.18, 1,811.69 and 1,171.84 is: 1,617.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.18 : 1,811.69 = 1,171.84 : x
  2. Step 2: Convert to fraction form
    1,312.18/1,811.69 = 1,171.84/x
  3. Step 3: Cross multiply
    1,312.18x = 1,811.69 × 1,171.84
  4. Step 4: Simplify right side
    1,312.18x = 2,123,010.81
  5. Step 5: Solve for x
    x = 2,123,010.81/1,312.18
  6. Step 6: Final answer
    x = 1,617.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.