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Finding the Fourth Proportional to 857.91, 1,183.74 and 508.62

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Solution

The fourth proportional to 857.91, 1,183.74 and 508.62 is: 701.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.91 : 1,183.74 = 508.62 : x
  2. Step 2: Convert to fraction form
    857.91/1,183.74 = 508.62/x
  3. Step 3: Cross multiply
    857.91x = 1,183.74 × 508.62
  4. Step 4: Simplify right side
    857.91x = 602,073.84
  5. Step 5: Solve for x
    x = 602,073.84/857.91
  6. Step 6: Final answer
    x = 701.79

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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.