Home / 1,515.12-2,088.36-1,199.76

Finding the Fourth Proportional to 1,515.12, 2,088.36 and 1,199.76

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Solution

The fourth proportional to 1,515.12, 2,088.36 and 1,199.76 is: 1,653.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.12 : 2,088.36 = 1,199.76 : x
  2. Step 2: Convert to fraction form
    1,515.12/2,088.36 = 1,199.76/x
  3. Step 3: Cross multiply
    1,515.12x = 2,088.36 × 1,199.76
  4. Step 4: Simplify right side
    1,515.12x = 2,505,530.79
  5. Step 5: Solve for x
    x = 2,505,530.79/1,515.12
  6. Step 6: Final answer
    x = 1,653.68

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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.