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Finding the Fourth Proportional to 1,054.29, 1,454.10 and 681.31

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Solution

The fourth proportional to 1,054.29, 1,454.10 and 681.31 is: 939.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,054.29 : 1,454.10 = 681.31 : x
  2. Step 2: Convert to fraction form
    1,054.29/1,454.10 = 681.31/x
  3. Step 3: Cross multiply
    1,054.29x = 1,454.10 × 681.31
  4. Step 4: Simplify right side
    1,054.29x = 990,686.68
  5. Step 5: Solve for x
    x = 990,686.68/1,054.29
  6. Step 6: Final answer
    x = 939.67

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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.