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Finding the Fourth Proportional to 485.69, 669.89 and 336.38

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Solution

The fourth proportional to 485.69, 669.89 and 336.38 is: 463.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.69 : 669.89 = 336.38 : x
  2. Step 2: Convert to fraction form
    485.69/669.89 = 336.38/x
  3. Step 3: Cross multiply
    485.69x = 669.89 × 336.38
  4. Step 4: Simplify right side
    485.69x = 225,335.09
  5. Step 5: Solve for x
    x = 225,335.09/485.69
  6. Step 6: Final answer
    x = 463.95

Related Problems

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Half scale
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Double scale
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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.