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Finding the Fourth Proportional to 883.65, 1,219.57 and 635.79

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Solution

The fourth proportional to 883.65, 1,219.57 and 635.79 is: 877.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.65 : 1,219.57 = 635.79 : x
  2. Step 2: Convert to fraction form
    883.65/1,219.57 = 635.79/x
  3. Step 3: Cross multiply
    883.65x = 1,219.57 × 635.79
  4. Step 4: Simplify right side
    883.65x = 775,390.41
  5. Step 5: Solve for x
    x = 775,390.41/883.65
  6. Step 6: Final answer
    x = 877.49

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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.