Home / 1,513.74-2,089.79-1,115.07

Finding the Fourth Proportional to 1,513.74, 2,089.79 and 1,115.07

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Solution

The fourth proportional to 1,513.74, 2,089.79 and 1,115.07 is: 1,539.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,513.74 : 2,089.79 = 1,115.07 : x
  2. Step 2: Convert to fraction form
    1,513.74/2,089.79 = 1,115.07/x
  3. Step 3: Cross multiply
    1,513.74x = 2,089.79 × 1,115.07
  4. Step 4: Simplify right side
    1,513.74x = 2,330,262.14
  5. Step 5: Solve for x
    x = 2,330,262.14/1,513.74
  6. Step 6: Final answer
    x = 1,539.41

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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.