Home / 1,316.31-1,974.53-438.90

Finding the Fourth Proportional to 1,316.31, 1,974.53 and 438.90

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Solution

The fourth proportional to 1,316.31, 1,974.53 and 438.90 is: 658.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.31 : 1,974.53 = 438.90 : x
  2. Step 2: Convert to fraction form
    1,316.31/1,974.53 = 438.90/x
  3. Step 3: Cross multiply
    1,316.31x = 1,974.53 × 438.90
  4. Step 4: Simplify right side
    1,316.31x = 866,621.22
  5. Step 5: Solve for x
    x = 866,621.22/1,316.31
  6. Step 6: Final answer
    x = 658.37

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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.