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Finding the Fourth Proportional to 653.99, 902.47 and 392.03

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Solution

The fourth proportional to 653.99, 902.47 and 392.03 is: 540.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.99 : 902.47 = 392.03 : x
  2. Step 2: Convert to fraction form
    653.99/902.47 = 392.03/x
  3. Step 3: Cross multiply
    653.99x = 902.47 × 392.03
  4. Step 4: Simplify right side
    653.99x = 353,795.31
  5. Step 5: Solve for x
    x = 353,795.31/653.99
  6. Step 6: Final answer
    x = 540.98

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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.