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Finding the Fourth Proportional to 917.36, 1,266.06 and 637.52

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Solution

The fourth proportional to 917.36, 1,266.06 and 637.52 is: 879.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.36 : 1,266.06 = 637.52 : x
  2. Step 2: Convert to fraction form
    917.36/1,266.06 = 637.52/x
  3. Step 3: Cross multiply
    917.36x = 1,266.06 × 637.52
  4. Step 4: Simplify right side
    917.36x = 807,138.57
  5. Step 5: Solve for x
    x = 807,138.57/917.36
  6. Step 6: Final answer
    x = 879.85

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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.