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Finding the Fourth Proportional to 581.12, 801.90 and 319.09

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Solution

The fourth proportional to 581.12, 801.90 and 319.09 is: 440.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.12 : 801.90 = 319.09 : x
  2. Step 2: Convert to fraction form
    581.12/801.90 = 319.09/x
  3. Step 3: Cross multiply
    581.12x = 801.90 × 319.09
  4. Step 4: Simplify right side
    581.12x = 255,874.26
  5. Step 5: Solve for x
    x = 255,874.26/581.12
  6. Step 6: Final answer
    x = 440.31

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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.