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Finding the Fourth Proportional to 1,022.50, 1,533.15 and 693.85

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Solution

The fourth proportional to 1,022.50, 1,533.15 and 693.85 is: 1,040.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,022.50 : 1,533.15 = 693.85 : x
  2. Step 2: Convert to fraction form
    1,022.50/1,533.15 = 693.85/x
  3. Step 3: Cross multiply
    1,022.50x = 1,533.15 × 693.85
  4. Step 4: Simplify right side
    1,022.50x = 1,063,776.13
  5. Step 5: Solve for x
    x = 1,063,776.13/1,022.50
  6. Step 6: Final answer
    x = 1,040.37

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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.