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Finding the Fourth Proportional to 521.83, 720.24 and 469.28

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Solution

The fourth proportional to 521.83, 720.24 and 469.28 is: 647.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.83 : 720.24 = 469.28 : x
  2. Step 2: Convert to fraction form
    521.83/720.24 = 469.28/x
  3. Step 3: Cross multiply
    521.83x = 720.24 × 469.28
  4. Step 4: Simplify right side
    521.83x = 337,994.23
  5. Step 5: Solve for x
    x = 337,994.23/521.83
  6. Step 6: Final answer
    x = 647.71

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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.