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Finding the Fourth Proportional to 903.41, 1,246.70 and 489.41

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Solution

The fourth proportional to 903.41, 1,246.70 and 489.41 is: 675.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.41 : 1,246.70 = 489.41 : x
  2. Step 2: Convert to fraction form
    903.41/1,246.70 = 489.41/x
  3. Step 3: Cross multiply
    903.41x = 1,246.70 × 489.41
  4. Step 4: Simplify right side
    903.41x = 610,147.45
  5. Step 5: Solve for x
    x = 610,147.45/903.41
  6. Step 6: Final answer
    x = 675.38

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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.