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Finding the Fourth Proportional to 1,004.80, 1,505.60 and 517.12

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Solution

The fourth proportional to 1,004.80, 1,505.60 and 517.12 is: 774.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.80 : 1,505.60 = 517.12 : x
  2. Step 2: Convert to fraction form
    1,004.80/1,505.60 = 517.12/x
  3. Step 3: Cross multiply
    1,004.80x = 1,505.60 × 517.12
  4. Step 4: Simplify right side
    1,004.80x = 778,575.87
  5. Step 5: Solve for x
    x = 778,575.87/1,004.80
  6. Step 6: Final answer
    x = 774.86

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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.