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Finding the Fourth Proportional to 529.20, 729 and 477.36

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Solution

The fourth proportional to 529.20, 729 and 477.36 is: 657.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.20 : 729 = 477.36 : x
  2. Step 2: Convert to fraction form
    529.20/729 = 477.36/x
  3. Step 3: Cross multiply
    529.20x = 729 × 477.36
  4. Step 4: Simplify right side
    529.20x = 347,995.44
  5. Step 5: Solve for x
    x = 347,995.44/529.20
  6. Step 6: Final answer
    x = 657.59

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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.