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Finding the Fourth Proportional to 480.15, 661.80 and 401.16

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Solution

The fourth proportional to 480.15, 661.80 and 401.16 is: 552.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.15 : 661.80 = 401.16 : x
  2. Step 2: Convert to fraction form
    480.15/661.80 = 401.16/x
  3. Step 3: Cross multiply
    480.15x = 661.80 × 401.16
  4. Step 4: Simplify right side
    480.15x = 265,487.69
  5. Step 5: Solve for x
    x = 265,487.69/480.15
  6. Step 6: Final answer
    x = 552.93

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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.