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Finding the Fourth Proportional to 407.83, 611.20 and 297.63

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Solution

The fourth proportional to 407.83, 611.20 and 297.63 is: 446.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.83 : 611.20 = 297.63 : x
  2. Step 2: Convert to fraction form
    407.83/611.20 = 297.63/x
  3. Step 3: Cross multiply
    407.83x = 611.20 × 297.63
  4. Step 4: Simplify right side
    407.83x = 181,909.56
  5. Step 5: Solve for x
    x = 181,909.56/407.83
  6. Step 6: Final answer
    x = 446.04

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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.