Home / 642.23-962.37-317.19

Finding the Fourth Proportional to 642.23, 962.37 and 317.19

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Solution

The fourth proportional to 642.23, 962.37 and 317.19 is: 475.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.23 : 962.37 = 317.19 : x
  2. Step 2: Convert to fraction form
    642.23/962.37 = 317.19/x
  3. Step 3: Cross multiply
    642.23x = 962.37 × 317.19
  4. Step 4: Simplify right side
    642.23x = 305,254.14
  5. Step 5: Solve for x
    x = 305,254.14/642.23
  6. Step 6: Final answer
    x = 475.30

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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.