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Finding the Fourth Proportional to 873.46, 1,205.17 and 637.54

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Solution

The fourth proportional to 873.46, 1,205.17 and 637.54 is: 879.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.46 : 1,205.17 = 637.54 : x
  2. Step 2: Convert to fraction form
    873.46/1,205.17 = 637.54/x
  3. Step 3: Cross multiply
    873.46x = 1,205.17 × 637.54
  4. Step 4: Simplify right side
    873.46x = 768,345.32
  5. Step 5: Solve for x
    x = 768,345.32/873.46
  6. Step 6: Final answer
    x = 879.66

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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.