Home / 1,421.74-2,124.37-1,112.86

Finding the Fourth Proportional to 1,421.74, 2,124.37 and 1,112.86

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Solution

The fourth proportional to 1,421.74, 2,124.37 and 1,112.86 is: 1,662.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.74 : 2,124.37 = 1,112.86 : x
  2. Step 2: Convert to fraction form
    1,421.74/2,124.37 = 1,112.86/x
  3. Step 3: Cross multiply
    1,421.74x = 2,124.37 × 1,112.86
  4. Step 4: Simplify right side
    1,421.74x = 2,364,126.40
  5. Step 5: Solve for x
    x = 2,364,126.40/1,421.74
  6. Step 6: Final answer
    x = 1,662.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.