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Finding the Fourth Proportional to 955.01, 1,429.67 and 520.85

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Solution

The fourth proportional to 955.01, 1,429.67 and 520.85 is: 779.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.01 : 1,429.67 = 520.85 : x
  2. Step 2: Convert to fraction form
    955.01/1,429.67 = 520.85/x
  3. Step 3: Cross multiply
    955.01x = 1,429.67 × 520.85
  4. Step 4: Simplify right side
    955.01x = 744,636.47
  5. Step 5: Solve for x
    x = 744,636.47/955.01
  6. Step 6: Final answer
    x = 779.72

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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.