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Finding the Fourth Proportional to 1,781.31, 2,457.99 and 995.25

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Solution

The fourth proportional to 1,781.31, 2,457.99 and 995.25 is: 1,373.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.31 : 2,457.99 = 995.25 : x
  2. Step 2: Convert to fraction form
    1,781.31/2,457.99 = 995.25/x
  3. Step 3: Cross multiply
    1,781.31x = 2,457.99 × 995.25
  4. Step 4: Simplify right side
    1,781.31x = 2,446,314.55
  5. Step 5: Solve for x
    x = 2,446,314.55/1,781.31
  6. Step 6: Final answer
    x = 1,373.32

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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.