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Finding the Fourth Proportional to 883.70, 1,219.47 and 510.79

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Solution

The fourth proportional to 883.70, 1,219.47 and 510.79 is: 704.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.70 : 1,219.47 = 510.79 : x
  2. Step 2: Convert to fraction form
    883.70/1,219.47 = 510.79/x
  3. Step 3: Cross multiply
    883.70x = 1,219.47 × 510.79
  4. Step 4: Simplify right side
    883.70x = 622,893.08
  5. Step 5: Solve for x
    x = 622,893.08/883.70
  6. Step 6: Final answer
    x = 704.87

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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.