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Finding the Fourth Proportional to 857.70, 1,183.62 and 508.38

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Solution

The fourth proportional to 857.70, 1,183.62 and 508.38 is: 701.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.70 : 1,183.62 = 508.38 : x
  2. Step 2: Convert to fraction form
    857.70/1,183.62 = 508.38/x
  3. Step 3: Cross multiply
    857.70x = 1,183.62 × 508.38
  4. Step 4: Simplify right side
    857.70x = 601,728.74
  5. Step 5: Solve for x
    x = 601,728.74/857.70
  6. Step 6: Final answer
    x = 701.56

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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.