Home / 1,781.30-2,457.74-1,109.63

Finding the Fourth Proportional to 1,781.30, 2,457.74 and 1,109.63

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Solution

The fourth proportional to 1,781.30, 2,457.74 and 1,109.63 is: 1,531.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.30 : 2,457.74 = 1,109.63 : x
  2. Step 2: Convert to fraction form
    1,781.30/2,457.74 = 1,109.63/x
  3. Step 3: Cross multiply
    1,781.30x = 2,457.74 × 1,109.63
  4. Step 4: Simplify right side
    1,781.30x = 2,727,182.04
  5. Step 5: Solve for x
    x = 2,727,182.04/1,781.30
  6. Step 6: Final answer
    x = 1,531.01

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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.