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Finding the Fourth Proportional to 654.67, 903.48 and 392.65

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Solution

The fourth proportional to 654.67, 903.48 and 392.65 is: 541.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.67 : 903.48 = 392.65 : x
  2. Step 2: Convert to fraction form
    654.67/903.48 = 392.65/x
  3. Step 3: Cross multiply
    654.67x = 903.48 × 392.65
  4. Step 4: Simplify right side
    654.67x = 354,751.42
  5. Step 5: Solve for x
    x = 354,751.42/654.67
  6. Step 6: Final answer
    x = 541.88

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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.