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Finding the Fourth Proportional to 528.48, 788.04 and 521.88

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Solution

The fourth proportional to 528.48, 788.04 and 521.88 is: 778.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.48 : 788.04 = 521.88 : x
  2. Step 2: Convert to fraction form
    528.48/788.04 = 521.88/x
  3. Step 3: Cross multiply
    528.48x = 788.04 × 521.88
  4. Step 4: Simplify right side
    528.48x = 411,262.32
  5. Step 5: Solve for x
    x = 411,262.32/528.48
  6. Step 6: Final answer
    x = 778.20

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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.