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Finding the Fourth Proportional to 612.17, 844.75 and 346.64

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Solution

The fourth proportional to 612.17, 844.75 and 346.64 is: 478.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.17 : 844.75 = 346.64 : x
  2. Step 2: Convert to fraction form
    612.17/844.75 = 346.64/x
  3. Step 3: Cross multiply
    612.17x = 844.75 × 346.64
  4. Step 4: Simplify right side
    612.17x = 292,824.14
  5. Step 5: Solve for x
    x = 292,824.14/612.17
  6. Step 6: Final answer
    x = 478.34

Related Problems

Find fourth proportional to 306.09, 422.38 and 173.32
Half scale
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Double scale
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Similar ratio
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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.