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Finding the Fourth Proportional to 620.13, 929.28 and 254.49

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Solution

The fourth proportional to 620.13, 929.28 and 254.49 is: 381.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.13 : 929.28 = 254.49 : x
  2. Step 2: Convert to fraction form
    620.13/929.28 = 254.49/x
  3. Step 3: Cross multiply
    620.13x = 929.28 × 254.49
  4. Step 4: Simplify right side
    620.13x = 236,492.47
  5. Step 5: Solve for x
    x = 236,492.47/620.13
  6. Step 6: Final answer
    x = 381.36

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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.