Home / 3,688.40-5,089.80-2,291.12

Finding the Fourth Proportional to 3,688.40, 5,089.80 and 2,291.12

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Solution

The fourth proportional to 3,688.40, 5,089.80 and 2,291.12 is: 3,161.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,688.40 : 5,089.80 = 2,291.12 : x
  2. Step 2: Convert to fraction form
    3,688.40/5,089.80 = 2,291.12/x
  3. Step 3: Cross multiply
    3,688.40x = 5,089.80 × 2,291.12
  4. Step 4: Simplify right side
    3,688.40x = 11,661,342.58
  5. Step 5: Solve for x
    x = 11,661,342.58/3,688.40
  6. Step 6: Final answer
    x = 3,161.63

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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.