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Finding the Fourth Proportional to 1,231.90, 1,847.80 and 501.45

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Solution

The fourth proportional to 1,231.90, 1,847.80 and 501.45 is: 752.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.90 : 1,847.80 = 501.45 : x
  2. Step 2: Convert to fraction form
    1,231.90/1,847.80 = 501.45/x
  3. Step 3: Cross multiply
    1,231.90x = 1,847.80 × 501.45
  4. Step 4: Simplify right side
    1,231.90x = 926,567.56
  5. Step 5: Solve for x
    x = 926,567.56/1,231.90
  6. Step 6: Final answer
    x = 752.15

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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.