Home / 1,285.44-1,927.68-636.48

Finding the Fourth Proportional to 1,285.44, 1,927.68 and 636.48

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Solution

The fourth proportional to 1,285.44, 1,927.68 and 636.48 is: 954.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.44 : 1,927.68 = 636.48 : x
  2. Step 2: Convert to fraction form
    1,285.44/1,927.68 = 636.48/x
  3. Step 3: Cross multiply
    1,285.44x = 1,927.68 × 636.48
  4. Step 4: Simplify right side
    1,285.44x = 1,226,929.77
  5. Step 5: Solve for x
    x = 1,226,929.77/1,285.44
  6. Step 6: Final answer
    x = 954.48

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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.