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Finding the Fourth Proportional to 660.29, 909.09 and 581.54

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Solution

The fourth proportional to 660.29, 909.09 and 581.54 is: 800.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.29 : 909.09 = 581.54 : x
  2. Step 2: Convert to fraction form
    660.29/909.09 = 581.54/x
  3. Step 3: Cross multiply
    660.29x = 909.09 × 581.54
  4. Step 4: Simplify right side
    660.29x = 528,667.65
  5. Step 5: Solve for x
    x = 528,667.65/660.29
  6. Step 6: Final answer
    x = 800.67

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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.