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Finding the Fourth Proportional to 444.16, 611.58 and 388.58

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Solution

The fourth proportional to 444.16, 611.58 and 388.58 is: 535.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.16 : 611.58 = 388.58 : x
  2. Step 2: Convert to fraction form
    444.16/611.58 = 388.58/x
  3. Step 3: Cross multiply
    444.16x = 611.58 × 388.58
  4. Step 4: Simplify right side
    444.16x = 237,647.76
  5. Step 5: Solve for x
    x = 237,647.76/444.16
  6. Step 6: Final answer
    x = 535.05

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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.