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Finding the Fourth Proportional to 654.75, 904.10 and 422.28

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Solution

The fourth proportional to 654.75, 904.10 and 422.28 is: 583.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.75 : 904.10 = 422.28 : x
  2. Step 2: Convert to fraction form
    654.75/904.10 = 422.28/x
  3. Step 3: Cross multiply
    654.75x = 904.10 × 422.28
  4. Step 4: Simplify right side
    654.75x = 381,781.24
  5. Step 5: Solve for x
    x = 381,781.24/654.75
  6. Step 6: Final answer
    x = 583.09

Related Problems

Find fourth proportional to 327.38, 452.05 and 211.14
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.