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Finding the Fourth Proportional to 617.54, 852.34 and 421.52

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Solution

The fourth proportional to 617.54, 852.34 and 421.52 is: 581.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.54 : 852.34 = 421.52 : x
  2. Step 2: Convert to fraction form
    617.54/852.34 = 421.52/x
  3. Step 3: Cross multiply
    617.54x = 852.34 × 421.52
  4. Step 4: Simplify right side
    617.54x = 359,278.36
  5. Step 5: Solve for x
    x = 359,278.36/617.54
  6. Step 6: Final answer
    x = 581.79

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1.5x scale

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.