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Finding the Fourth Proportional to 528.69, 728.82 and 417.99

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Solution

The fourth proportional to 528.69, 728.82 and 417.99 is: 576.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.69 : 728.82 = 417.99 : x
  2. Step 2: Convert to fraction form
    528.69/728.82 = 417.99/x
  3. Step 3: Cross multiply
    528.69x = 728.82 × 417.99
  4. Step 4: Simplify right side
    528.69x = 304,639.47
  5. Step 5: Solve for x
    x = 304,639.47/528.69
  6. Step 6: Final answer
    x = 576.22

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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.