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Finding the Fourth Proportional to 1,055.29, 1,455.47 and 682.31

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Solution

The fourth proportional to 1,055.29, 1,455.47 and 682.31 is: 941.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.29 : 1,455.47 = 682.31 : x
  2. Step 2: Convert to fraction form
    1,055.29/1,455.47 = 682.31/x
  3. Step 3: Cross multiply
    1,055.29x = 1,455.47 × 682.31
  4. Step 4: Simplify right side
    1,055.29x = 993,081.74
  5. Step 5: Solve for x
    x = 993,081.74/1,055.29
  6. Step 6: Final answer
    x = 941.05

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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.