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Finding the Fourth Proportional to 666.06, 919.10 and 400.46

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Solution

The fourth proportional to 666.06, 919.10 and 400.46 is: 552.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.06 : 919.10 = 400.46 : x
  2. Step 2: Convert to fraction form
    666.06/919.10 = 400.46/x
  3. Step 3: Cross multiply
    666.06x = 919.10 × 400.46
  4. Step 4: Simplify right side
    666.06x = 368,062.79
  5. Step 5: Solve for x
    x = 368,062.79/666.06
  6. Step 6: Final answer
    x = 552.60

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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.