Home / 1,317.70-1,975.98-393.04

Finding the Fourth Proportional to 1,317.70, 1,975.98 and 393.04

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Solution

The fourth proportional to 1,317.70, 1,975.98 and 393.04 is: 589.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.70 : 1,975.98 = 393.04 : x
  2. Step 2: Convert to fraction form
    1,317.70/1,975.98 = 393.04/x
  3. Step 3: Cross multiply
    1,317.70x = 1,975.98 × 393.04
  4. Step 4: Simplify right side
    1,317.70x = 776,639.18
  5. Step 5: Solve for x
    x = 776,639.18/1,317.70
  6. Step 6: Final answer
    x = 589.39

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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.