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Finding the Fourth Proportional to 526.69, 788.95 and 520.21

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Solution

The fourth proportional to 526.69, 788.95 and 520.21 is: 779.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.69 : 788.95 = 520.21 : x
  2. Step 2: Convert to fraction form
    526.69/788.95 = 520.21/x
  3. Step 3: Cross multiply
    526.69x = 788.95 × 520.21
  4. Step 4: Simplify right side
    526.69x = 410,419.68
  5. Step 5: Solve for x
    x = 410,419.68/526.69
  6. Step 6: Final answer
    x = 779.24

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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.