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Finding the Fourth Proportional to 903.75, 1,247.52 and 554.43

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Solution

The fourth proportional to 903.75, 1,247.52 and 554.43 is: 765.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.75 : 1,247.52 = 554.43 : x
  2. Step 2: Convert to fraction form
    903.75/1,247.52 = 554.43/x
  3. Step 3: Cross multiply
    903.75x = 1,247.52 × 554.43
  4. Step 4: Simplify right side
    903.75x = 691,662.51
  5. Step 5: Solve for x
    x = 691,662.51/903.75
  6. Step 6: Final answer
    x = 765.33

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1.5x scale

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.