Home / 2,712.40-4,051.52-2,420.80

Finding the Fourth Proportional to 2,712.40, 4,051.52 and 2,420.80

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Solution

The fourth proportional to 2,712.40, 4,051.52 and 2,420.80 is: 3,615.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,712.40 : 4,051.52 = 2,420.80 : x
  2. Step 2: Convert to fraction form
    2,712.40/4,051.52 = 2,420.80/x
  3. Step 3: Cross multiply
    2,712.40x = 4,051.52 × 2,420.80
  4. Step 4: Simplify right side
    2,712.40x = 9,807,919.62
  5. Step 5: Solve for x
    x = 9,807,919.62/2,712.40
  6. Step 6: Final answer
    x = 3,615.96

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1.5x scale

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.