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Finding the Fourth Proportional to 837.77, 1,256.66 and 472.55

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Solution

The fourth proportional to 837.77, 1,256.66 and 472.55 is: 708.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.77 : 1,256.66 = 472.55 : x
  2. Step 2: Convert to fraction form
    837.77/1,256.66 = 472.55/x
  3. Step 3: Cross multiply
    837.77x = 1,256.66 × 472.55
  4. Step 4: Simplify right side
    837.77x = 593,826.04
  5. Step 5: Solve for x
    x = 593,826.04/837.77
  6. Step 6: Final answer
    x = 708.82

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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.