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Finding the Fourth Proportional to 1,002.87, 1,503.73 and 386.50

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Solution

The fourth proportional to 1,002.87, 1,503.73 and 386.50 is: 579.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,002.87 : 1,503.73 = 386.50 : x
  2. Step 2: Convert to fraction form
    1,002.87/1,503.73 = 386.50/x
  3. Step 3: Cross multiply
    1,002.87x = 1,503.73 × 386.50
  4. Step 4: Simplify right side
    1,002.87x = 581,188.85
  5. Step 5: Solve for x
    x = 581,188.85/1,002.87
  6. Step 6: Final answer
    x = 579.52

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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.