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Finding the Fourth Proportional to 885.55, 1,328.73 and 423.34

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Solution

The fourth proportional to 885.55, 1,328.73 and 423.34 is: 635.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.55 : 1,328.73 = 423.34 : x
  2. Step 2: Convert to fraction form
    885.55/1,328.73 = 423.34/x
  3. Step 3: Cross multiply
    885.55x = 1,328.73 × 423.34
  4. Step 4: Simplify right side
    885.55x = 562,504.56
  5. Step 5: Solve for x
    x = 562,504.56/885.55
  6. Step 6: Final answer
    x = 635.20

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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.