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Finding the Fourth Proportional to 903.15, 1,347.98 and 881.28

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Solution

The fourth proportional to 903.15, 1,347.98 and 881.28 is: 1,315.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.15 : 1,347.98 = 881.28 : x
  2. Step 2: Convert to fraction form
    903.15/1,347.98 = 881.28/x
  3. Step 3: Cross multiply
    903.15x = 1,347.98 × 881.28
  4. Step 4: Simplify right side
    903.15x = 1,187,943.41
  5. Step 5: Solve for x
    x = 1,187,943.41/903.15
  6. Step 6: Final answer
    x = 1,315.33

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.