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Finding the Fourth Proportional to 528.64, 729.80 and 342.36

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Solution

The fourth proportional to 528.64, 729.80 and 342.36 is: 472.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.64 : 729.80 = 342.36 : x
  2. Step 2: Convert to fraction form
    528.64/729.80 = 342.36/x
  3. Step 3: Cross multiply
    528.64x = 729.80 × 342.36
  4. Step 4: Simplify right side
    528.64x = 249,854.33
  5. Step 5: Solve for x
    x = 249,854.33/528.64
  6. Step 6: Final answer
    x = 472.64

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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.