Home / 1,071.27-1,478.12-629.15

Finding the Fourth Proportional to 1,071.27, 1,478.12 and 629.15

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Solution

The fourth proportional to 1,071.27, 1,478.12 and 629.15 is: 868.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,071.27 : 1,478.12 = 629.15 : x
  2. Step 2: Convert to fraction form
    1,071.27/1,478.12 = 629.15/x
  3. Step 3: Cross multiply
    1,071.27x = 1,478.12 × 629.15
  4. Step 4: Simplify right side
    1,071.27x = 929,948.66
  5. Step 5: Solve for x
    x = 929,948.66/1,071.27
  6. Step 6: Final answer
    x = 868.08

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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.