Home / 1,285.20-1,926.18-636.12

Finding the Fourth Proportional to 1,285.20, 1,926.18 and 636.12

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Solution

The fourth proportional to 1,285.20, 1,926.18 and 636.12 is: 953.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.20 : 1,926.18 = 636.12 : x
  2. Step 2: Convert to fraction form
    1,285.20/1,926.18 = 636.12/x
  3. Step 3: Cross multiply
    1,285.20x = 1,926.18 × 636.12
  4. Step 4: Simplify right side
    1,285.20x = 1,225,281.62
  5. Step 5: Solve for x
    x = 1,225,281.62/1,285.20
  6. Step 6: Final answer
    x = 953.38

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1.5x scale

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.