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Finding the Fourth Proportional to 485.48, 669.46 and 415.77

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Solution

The fourth proportional to 485.48, 669.46 and 415.77 is: 573.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.48 : 669.46 = 415.77 : x
  2. Step 2: Convert to fraction form
    485.48/669.46 = 415.77/x
  3. Step 3: Cross multiply
    485.48x = 669.46 × 415.77
  4. Step 4: Simplify right side
    485.48x = 278,341.38
  5. Step 5: Solve for x
    x = 278,341.38/485.48
  6. Step 6: Final answer
    x = 573.33

Related Problems

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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.