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Finding the Fourth Proportional to 903.15, 1,335.51 and 903.15

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Solution

The fourth proportional to 903.15, 1,335.51 and 903.15 is: 1,335.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.15 : 1,335.51 = 903.15 : x
  2. Step 2: Convert to fraction form
    903.15/1,335.51 = 903.15/x
  3. Step 3: Cross multiply
    903.15x = 1,335.51 × 903.15
  4. Step 4: Simplify right side
    903.15x = 1,206,165.86
  5. Step 5: Solve for x
    x = 1,206,165.86/903.15
  6. Step 6: Final answer
    x = 1,335.51

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.