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Finding the Fourth Proportional to 837.15, 1,256.54 and 654.09

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Solution

The fourth proportional to 837.15, 1,256.54 and 654.09 is: 981.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.15 : 1,256.54 = 654.09 : x
  2. Step 2: Convert to fraction form
    837.15/1,256.54 = 654.09/x
  3. Step 3: Cross multiply
    837.15x = 1,256.54 × 654.09
  4. Step 4: Simplify right side
    837.15x = 821,886.98
  5. Step 5: Solve for x
    x = 821,886.98/837.15
  6. Step 6: Final answer
    x = 981.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.