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Finding the Fourth Proportional to 903.54, 1,246.87 and 489.54

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Solution

The fourth proportional to 903.54, 1,246.87 and 489.54 is: 675.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.54 : 1,246.87 = 489.54 : x
  2. Step 2: Convert to fraction form
    903.54/1,246.87 = 489.54/x
  3. Step 3: Cross multiply
    903.54x = 1,246.87 × 489.54
  4. Step 4: Simplify right side
    903.54x = 610,392.74
  5. Step 5: Solve for x
    x = 610,392.74/903.54
  6. Step 6: Final answer
    x = 675.56

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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.