Home / 1,317.17-1,976.13-392.74

Finding the Fourth Proportional to 1,317.17, 1,976.13 and 392.74

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Solution

The fourth proportional to 1,317.17, 1,976.13 and 392.74 is: 589.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.17 : 1,976.13 = 392.74 : x
  2. Step 2: Convert to fraction form
    1,317.17/1,976.13 = 392.74/x
  3. Step 3: Cross multiply
    1,317.17x = 1,976.13 × 392.74
  4. Step 4: Simplify right side
    1,317.17x = 776,100.36
  5. Step 5: Solve for x
    x = 776,100.36/1,317.17
  6. Step 6: Final answer
    x = 589.22

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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.