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Finding the Fourth Proportional to 626.48, 939.06 and 317.64

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Solution

The fourth proportional to 626.48, 939.06 and 317.64 is: 476.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.48 : 939.06 = 317.64 : x
  2. Step 2: Convert to fraction form
    626.48/939.06 = 317.64/x
  3. Step 3: Cross multiply
    626.48x = 939.06 × 317.64
  4. Step 4: Simplify right side
    626.48x = 298,283.02
  5. Step 5: Solve for x
    x = 298,283.02/626.48
  6. Step 6: Final answer
    x = 476.13

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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.