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Finding the Fourth Proportional to 626.54, 939.60 and 256.25

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Solution

The fourth proportional to 626.54, 939.60 and 256.25 is: 384.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.54 : 939.60 = 256.25 : x
  2. Step 2: Convert to fraction form
    626.54/939.60 = 256.25/x
  3. Step 3: Cross multiply
    626.54x = 939.60 × 256.25
  4. Step 4: Simplify right side
    626.54x = 240,772.50
  5. Step 5: Solve for x
    x = 240,772.50/626.54
  6. Step 6: Final answer
    x = 384.29

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1.5x scale

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.