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Finding the Fourth Proportional to 909.22, 1,254.99 and 577.90

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Solution

The fourth proportional to 909.22, 1,254.99 and 577.90 is: 797.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.22 : 1,254.99 = 577.90 : x
  2. Step 2: Convert to fraction form
    909.22/1,254.99 = 577.90/x
  3. Step 3: Cross multiply
    909.22x = 1,254.99 × 577.90
  4. Step 4: Simplify right side
    909.22x = 725,258.72
  5. Step 5: Solve for x
    x = 725,258.72/909.22
  6. Step 6: Final answer
    x = 797.67

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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.