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Finding the Fourth Proportional to 1,285.48, 1,927.14 and 635.68

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Solution

The fourth proportional to 1,285.48, 1,927.14 and 635.68 is: 952.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.48 : 1,927.14 = 635.68 : x
  2. Step 2: Convert to fraction form
    1,285.48/1,927.14 = 635.68/x
  3. Step 3: Cross multiply
    1,285.48x = 1,927.14 × 635.68
  4. Step 4: Simplify right side
    1,285.48x = 1,225,044.36
  5. Step 5: Solve for x
    x = 1,225,044.36/1,285.48
  6. Step 6: Final answer
    x = 952.99

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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.