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Finding the Fourth Proportional to 482.74, 665.88 and 308.18

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Solution

The fourth proportional to 482.74, 665.88 and 308.18 is: 425.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.74 : 665.88 = 308.18 : x
  2. Step 2: Convert to fraction form
    482.74/665.88 = 308.18/x
  3. Step 3: Cross multiply
    482.74x = 665.88 × 308.18
  4. Step 4: Simplify right side
    482.74x = 205,210.90
  5. Step 5: Solve for x
    x = 205,210.90/482.74
  6. Step 6: Final answer
    x = 425.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.