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Finding the Fourth Proportional to 1,069.26, 1,602.51 and 520.38

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Solution

The fourth proportional to 1,069.26, 1,602.51 and 520.38 is: 779.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.26 : 1,602.51 = 520.38 : x
  2. Step 2: Convert to fraction form
    1,069.26/1,602.51 = 520.38/x
  3. Step 3: Cross multiply
    1,069.26x = 1,602.51 × 520.38
  4. Step 4: Simplify right side
    1,069.26x = 833,914.15
  5. Step 5: Solve for x
    x = 833,914.15/1,069.26
  6. Step 6: Final answer
    x = 779.90

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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.