Home / 639.02-958.17-254.18

Finding the Fourth Proportional to 639.02, 958.17 and 254.18

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Solution

The fourth proportional to 639.02, 958.17 and 254.18 is: 381.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.02 : 958.17 = 254.18 : x
  2. Step 2: Convert to fraction form
    639.02/958.17 = 254.18/x
  3. Step 3: Cross multiply
    639.02x = 958.17 × 254.18
  4. Step 4: Simplify right side
    639.02x = 243,547.65
  5. Step 5: Solve for x
    x = 243,547.65/639.02
  6. Step 6: Final answer
    x = 381.13

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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.