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Finding the Fourth Proportional to 837.39, 1,155.39 and 488.07

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Solution

The fourth proportional to 837.39, 1,155.39 and 488.07 is: 673.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.39 : 1,155.39 = 488.07 : x
  2. Step 2: Convert to fraction form
    837.39/1,155.39 = 488.07/x
  3. Step 3: Cross multiply
    837.39x = 1,155.39 × 488.07
  4. Step 4: Simplify right side
    837.39x = 563,911.20
  5. Step 5: Solve for x
    x = 563,911.20/837.39
  6. Step 6: Final answer
    x = 673.42

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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.