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Finding the Fourth Proportional to 485.82, 669.92 and 346.16

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Solution

The fourth proportional to 485.82, 669.92 and 346.16 is: 477.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.82 : 669.92 = 346.16 : x
  2. Step 2: Convert to fraction form
    485.82/669.92 = 346.16/x
  3. Step 3: Cross multiply
    485.82x = 669.92 × 346.16
  4. Step 4: Simplify right side
    485.82x = 231,899.51
  5. Step 5: Solve for x
    x = 231,899.51/485.82
  6. Step 6: Final answer
    x = 477.34

Related Problems

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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.