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Finding the Fourth Proportional to 666.06, 921.72 and 577.54

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Solution

The fourth proportional to 666.06, 921.72 and 577.54 is: 799.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.06 : 921.72 = 577.54 : x
  2. Step 2: Convert to fraction form
    666.06/921.72 = 577.54/x
  3. Step 3: Cross multiply
    666.06x = 921.72 × 577.54
  4. Step 4: Simplify right side
    666.06x = 532,330.17
  5. Step 5: Solve for x
    x = 532,330.17/666.06
  6. Step 6: Final answer
    x = 799.22

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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.