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Finding the Fourth Proportional to 900.93, 1,242.54 and 636.27

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Solution

The fourth proportional to 900.93, 1,242.54 and 636.27 is: 877.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.93 : 1,242.54 = 636.27 : x
  2. Step 2: Convert to fraction form
    900.93/1,242.54 = 636.27/x
  3. Step 3: Cross multiply
    900.93x = 1,242.54 × 636.27
  4. Step 4: Simplify right side
    900.93x = 790,590.93
  5. Step 5: Solve for x
    x = 790,590.93/900.93
  6. Step 6: Final answer
    x = 877.53

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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.