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Finding the Fourth Proportional to 903.41, 1,246.69 and 637.57

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Solution

The fourth proportional to 903.41, 1,246.69 and 637.57 is: 879.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.41 : 1,246.69 = 637.57 : x
  2. Step 2: Convert to fraction form
    903.41/1,246.69 = 637.57/x
  3. Step 3: Cross multiply
    903.41x = 1,246.69 × 637.57
  4. Step 4: Simplify right side
    903.41x = 794,852.14
  5. Step 5: Solve for x
    x = 794,852.14/903.41
  6. Step 6: Final answer
    x = 879.84

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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.