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Finding the Fourth Proportional to 440.56, 607.72 and 388.23

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Solution

The fourth proportional to 440.56, 607.72 and 388.23 is: 535.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.56 : 607.72 = 388.23 : x
  2. Step 2: Convert to fraction form
    440.56/607.72 = 388.23/x
  3. Step 3: Cross multiply
    440.56x = 607.72 × 388.23
  4. Step 4: Simplify right side
    440.56x = 235,934.17
  5. Step 5: Solve for x
    x = 235,934.17/440.56
  6. Step 6: Final answer
    x = 535.54

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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.