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Finding the Fourth Proportional to 484.64, 669.12 and 353.42

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Solution

The fourth proportional to 484.64, 669.12 and 353.42 is: 487.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.64 : 669.12 = 353.42 : x
  2. Step 2: Convert to fraction form
    484.64/669.12 = 353.42/x
  3. Step 3: Cross multiply
    484.64x = 669.12 × 353.42
  4. Step 4: Simplify right side
    484.64x = 236,480.39
  5. Step 5: Solve for x
    x = 236,480.39/484.64
  6. Step 6: Final answer
    x = 487.95

Related Problems

Find fourth proportional to 242.32, 334.56 and 176.71
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Double scale
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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.