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Finding the Fourth Proportional to 484.88, 669.06 and 319.16

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Solution

The fourth proportional to 484.88, 669.06 and 319.16 is: 440.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.88 : 669.06 = 319.16 : x
  2. Step 2: Convert to fraction form
    484.88/669.06 = 319.16/x
  3. Step 3: Cross multiply
    484.88x = 669.06 × 319.16
  4. Step 4: Simplify right side
    484.88x = 213,537.19
  5. Step 5: Solve for x
    x = 213,537.19/484.88
  6. Step 6: Final answer
    x = 440.39

Related Problems

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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.