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Finding the Fourth Proportional to 612.20, 844.76 and 346.66

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Solution

The fourth proportional to 612.20, 844.76 and 346.66 is: 478.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.20 : 844.76 = 346.66 : x
  2. Step 2: Convert to fraction form
    612.20/844.76 = 346.66/x
  3. Step 3: Cross multiply
    612.20x = 844.76 × 346.66
  4. Step 4: Simplify right side
    612.20x = 292,843.26
  5. Step 5: Solve for x
    x = 292,843.26/612.20
  6. Step 6: Final answer
    x = 478.34

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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.