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Finding the Fourth Proportional to 407.00, 611.12 and 392.83

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Solution

The fourth proportional to 407.00, 611.12 and 392.83 is: 589.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.00 : 611.12 = 392.83 : x
  2. Step 2: Convert to fraction form
    407.00/611.12 = 392.83/x
  3. Step 3: Cross multiply
    407.00x = 611.12 × 392.83
  4. Step 4: Simplify right side
    407.00x = 240,062.78
  5. Step 5: Solve for x
    x = 240,062.78/407.00
  6. Step 6: Final answer
    x = 589.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.