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Finding the Fourth Proportional to 581.06, 870.82 and 426.26

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Solution

The fourth proportional to 581.06, 870.82 and 426.26 is: 638.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.06 : 870.82 = 426.26 : x
  2. Step 2: Convert to fraction form
    581.06/870.82 = 426.26/x
  3. Step 3: Cross multiply
    581.06x = 870.82 × 426.26
  4. Step 4: Simplify right side
    581.06x = 371,199.85
  5. Step 5: Solve for x
    x = 371,199.85/581.06
  6. Step 6: Final answer
    x = 638.83

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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.