Home / 1,316.73-1,975.29-392.18

Finding the Fourth Proportional to 1,316.73, 1,975.29 and 392.18

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Solution

The fourth proportional to 1,316.73, 1,975.29 and 392.18 is: 588.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.73 : 1,975.29 = 392.18 : x
  2. Step 2: Convert to fraction form
    1,316.73/1,975.29 = 392.18/x
  3. Step 3: Cross multiply
    1,316.73x = 1,975.29 × 392.18
  4. Step 4: Simplify right side
    1,316.73x = 774,669.23
  5. Step 5: Solve for x
    x = 774,669.23/1,316.73
  6. Step 6: Final answer
    x = 588.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.