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Finding the Fourth Proportional to 1,055.80, 1,457.17 and 682.94

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Solution

The fourth proportional to 1,055.80, 1,457.17 and 682.94 is: 942.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.80 : 1,457.17 = 682.94 : x
  2. Step 2: Convert to fraction form
    1,055.80/1,457.17 = 682.94/x
  3. Step 3: Cross multiply
    1,055.80x = 1,457.17 × 682.94
  4. Step 4: Simplify right side
    1,055.80x = 995,159.68
  5. Step 5: Solve for x
    x = 995,159.68/1,055.80
  6. Step 6: Final answer
    x = 942.57

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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.