Home / 1,121.51-1,679.27-1,056.81

Finding the Fourth Proportional to 1,121.51, 1,679.27 and 1,056.81

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Solution

The fourth proportional to 1,121.51, 1,679.27 and 1,056.81 is: 1,582.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.51 : 1,679.27 = 1,056.81 : x
  2. Step 2: Convert to fraction form
    1,121.51/1,679.27 = 1,056.81/x
  3. Step 3: Cross multiply
    1,121.51x = 1,679.27 × 1,056.81
  4. Step 4: Simplify right side
    1,121.51x = 1,774,670.34
  5. Step 5: Solve for x
    x = 1,774,670.34/1,121.51
  6. Step 6: Final answer
    x = 1,582.39

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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.