Home / 1,720.90-2,374.38-1,091.12

Finding the Fourth Proportional to 1,720.90, 2,374.38 and 1,091.12

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Solution

The fourth proportional to 1,720.90, 2,374.38 and 1,091.12 is: 1,505.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.90 : 2,374.38 = 1,091.12 : x
  2. Step 2: Convert to fraction form
    1,720.90/2,374.38 = 1,091.12/x
  3. Step 3: Cross multiply
    1,720.90x = 2,374.38 × 1,091.12
  4. Step 4: Simplify right side
    1,720.90x = 2,590,733.51
  5. Step 5: Solve for x
    x = 2,590,733.51/1,720.90
  6. Step 6: Final answer
    x = 1,505.45

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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.