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Finding the Fourth Proportional to 439.10, 659.08 and 315.83

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Solution

The fourth proportional to 439.10, 659.08 and 315.83 is: 474.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.10 : 659.08 = 315.83 : x
  2. Step 2: Convert to fraction form
    439.10/659.08 = 315.83/x
  3. Step 3: Cross multiply
    439.10x = 659.08 × 315.83
  4. Step 4: Simplify right side
    439.10x = 208,158.39
  5. Step 5: Solve for x
    x = 208,158.39/439.10
  6. Step 6: Final answer
    x = 474.06

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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.