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Finding the Fourth Proportional to 1,017.10, 1,525.65 and 439.57

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Solution

The fourth proportional to 1,017.10, 1,525.65 and 439.57 is: 659.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017.10 : 1,525.65 = 439.57 : x
  2. Step 2: Convert to fraction form
    1,017.10/1,525.65 = 439.57/x
  3. Step 3: Cross multiply
    1,017.10x = 1,525.65 × 439.57
  4. Step 4: Simplify right side
    1,017.10x = 670,629.97
  5. Step 5: Solve for x
    x = 670,629.97/1,017.10
  6. Step 6: Final answer
    x = 659.36

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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.