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Finding the Fourth Proportional to 660.48, 910.64 and 529.28

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Solution

The fourth proportional to 660.48, 910.64 and 529.28 is: 729.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.48 : 910.64 = 529.28 : x
  2. Step 2: Convert to fraction form
    660.48/910.64 = 529.28/x
  3. Step 3: Cross multiply
    660.48x = 910.64 × 529.28
  4. Step 4: Simplify right side
    660.48x = 481,983.54
  5. Step 5: Solve for x
    x = 481,983.54/660.48
  6. Step 6: Final answer
    x = 729.75

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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.