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Finding the Fourth Proportional to 903.19, 1,246.40 and 489.19

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Solution

The fourth proportional to 903.19, 1,246.40 and 489.19 is: 675.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.19 : 1,246.40 = 489.19 : x
  2. Step 2: Convert to fraction form
    903.19/1,246.40 = 489.19/x
  3. Step 3: Cross multiply
    903.19x = 1,246.40 × 489.19
  4. Step 4: Simplify right side
    903.19x = 609,722.69
  5. Step 5: Solve for x
    x = 609,722.69/903.19
  6. Step 6: Final answer
    x = 675.08

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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.