Home / 4,342.80-6,512.60-1,421.20

Finding the Fourth Proportional to 4,342.80, 6,512.60 and 1,421.20

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Solution

The fourth proportional to 4,342.80, 6,512.60 and 1,421.20 is: 2,131.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,342.80 : 6,512.60 = 1,421.20 : x
  2. Step 2: Convert to fraction form
    4,342.80/6,512.60 = 1,421.20/x
  3. Step 3: Cross multiply
    4,342.80x = 6,512.60 × 1,421.20
  4. Step 4: Simplify right side
    4,342.80x = 9,255,707.12
  5. Step 5: Solve for x
    x = 9,255,707.12/4,342.80
  6. Step 6: Final answer
    x = 2,131.28

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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.