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Finding the Fourth Proportional to 653.91, 902.37 and 388.38

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Solution

The fourth proportional to 653.91, 902.37 and 388.38 is: 535.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.91 : 902.37 = 388.38 : x
  2. Step 2: Convert to fraction form
    653.91/902.37 = 388.38/x
  3. Step 3: Cross multiply
    653.91x = 902.37 × 388.38
  4. Step 4: Simplify right side
    653.91x = 350,462.46
  5. Step 5: Solve for x
    x = 350,462.46/653.91
  6. Step 6: Final answer
    x = 535.95

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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.