Home / 1,645.13-2,272.14-1,120.25

Finding the Fourth Proportional to 1,645.13, 2,272.14 and 1,120.25

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Solution

The fourth proportional to 1,645.13, 2,272.14 and 1,120.25 is: 1,547.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.13 : 2,272.14 = 1,120.25 : x
  2. Step 2: Convert to fraction form
    1,645.13/2,272.14 = 1,120.25/x
  3. Step 3: Cross multiply
    1,645.13x = 2,272.14 × 1,120.25
  4. Step 4: Simplify right side
    1,645.13x = 2,545,353.47
  5. Step 5: Solve for x
    x = 2,545,353.47/1,645.13
  6. Step 6: Final answer
    x = 1,547.21

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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.