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Finding the Fourth Proportional to 653.81, 902.26 and 391.98

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Solution

The fourth proportional to 653.81, 902.26 and 391.98 is: 540.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.81 : 902.26 = 391.98 : x
  2. Step 2: Convert to fraction form
    653.81/902.26 = 391.98/x
  3. Step 3: Cross multiply
    653.81x = 902.26 × 391.98
  4. Step 4: Simplify right side
    653.81x = 353,668.36
  5. Step 5: Solve for x
    x = 353,668.36/653.81
  6. Step 6: Final answer
    x = 540.93

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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.