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Finding the Fourth Proportional to 601.88, 830.12 and 392.12

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Solution

The fourth proportional to 601.88, 830.12 and 392.12 is: 540.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    601.88 : 830.12 = 392.12 : x
  2. Step 2: Convert to fraction form
    601.88/830.12 = 392.12/x
  3. Step 3: Cross multiply
    601.88x = 830.12 × 392.12
  4. Step 4: Simplify right side
    601.88x = 325,506.65
  5. Step 5: Solve for x
    x = 325,506.65/601.88
  6. Step 6: Final answer
    x = 540.82

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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.