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Finding the Fourth Proportional to 624.20, 931.74 and 581.48

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Solution

The fourth proportional to 624.20, 931.74 and 581.48 is: 867.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.20 : 931.74 = 581.48 : x
  2. Step 2: Convert to fraction form
    624.20/931.74 = 581.48/x
  3. Step 3: Cross multiply
    624.20x = 931.74 × 581.48
  4. Step 4: Simplify right side
    624.20x = 541,788.18
  5. Step 5: Solve for x
    x = 541,788.18/624.20
  6. Step 6: Final answer
    x = 867.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.