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Finding the Fourth Proportional to 1,786.20, 2,465 and 1,000.32

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Solution

The fourth proportional to 1,786.20, 2,465 and 1,000.32 is: 1,380.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.20 : 2,465 = 1,000.32 : x
  2. Step 2: Convert to fraction form
    1,786.20/2,465 = 1,000.32/x
  3. Step 3: Cross multiply
    1,786.20x = 2,465 × 1,000.32
  4. Step 4: Simplify right side
    1,786.20x = 2,465,788.80
  5. Step 5: Solve for x
    x = 2,465,788.80/1,786.20
  6. Step 6: Final answer
    x = 1,380.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.