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Finding the Fourth Proportional to 529.72, 795.30 and 521.80

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Solution

The fourth proportional to 529.72, 795.30 and 521.80 is: 783.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.72 : 795.30 = 521.80 : x
  2. Step 2: Convert to fraction form
    529.72/795.30 = 521.80/x
  3. Step 3: Cross multiply
    529.72x = 795.30 × 521.80
  4. Step 4: Simplify right side
    529.72x = 414,987.54
  5. Step 5: Solve for x
    x = 414,987.54/529.72
  6. Step 6: Final answer
    x = 783.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.