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Finding the Fourth Proportional to 524.28, 780.42 and 521.52

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Solution

The fourth proportional to 524.28, 780.42 and 521.52 is: 776.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.28 : 780.42 = 521.52 : x
  2. Step 2: Convert to fraction form
    524.28/780.42 = 521.52/x
  3. Step 3: Cross multiply
    524.28x = 780.42 × 521.52
  4. Step 4: Simplify right side
    524.28x = 407,004.64
  5. Step 5: Solve for x
    x = 407,004.64/524.28
  6. Step 6: Final answer
    x = 776.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.