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Finding the Fourth Proportional to 883.65, 1,219.47 and 505.60

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Solution

The fourth proportional to 883.65, 1,219.47 and 505.60 is: 697.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.65 : 1,219.47 = 505.60 : x
  2. Step 2: Convert to fraction form
    883.65/1,219.47 = 505.60/x
  3. Step 3: Cross multiply
    883.65x = 1,219.47 × 505.60
  4. Step 4: Simplify right side
    883.65x = 616,571.57
  5. Step 5: Solve for x
    x = 616,571.57/883.65
  6. Step 6: Final answer
    x = 697.75

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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.