Home / 1,071.52-1,478.46-629.16

Finding the Fourth Proportional to 1,071.52, 1,478.46 and 629.16

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Solution

The fourth proportional to 1,071.52, 1,478.46 and 629.16 is: 868.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,071.52 : 1,478.46 = 629.16 : x
  2. Step 2: Convert to fraction form
    1,071.52/1,478.46 = 629.16/x
  3. Step 3: Cross multiply
    1,071.52x = 1,478.46 × 629.16
  4. Step 4: Simplify right side
    1,071.52x = 930,187.89
  5. Step 5: Solve for x
    x = 930,187.89/1,071.52
  6. Step 6: Final answer
    x = 868.11

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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.