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Finding the Fourth Proportional to 620.16, 854.80 and 440.48

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Solution

The fourth proportional to 620.16, 854.80 and 440.48 is: 607.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.16 : 854.80 = 440.48 : x
  2. Step 2: Convert to fraction form
    620.16/854.80 = 440.48/x
  3. Step 3: Cross multiply
    620.16x = 854.80 × 440.48
  4. Step 4: Simplify right side
    620.16x = 376,522.30
  5. Step 5: Solve for x
    x = 376,522.30/620.16
  6. Step 6: Final answer
    x = 607.14

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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.