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Finding the Fourth Proportional to 903.75, 1,247.21 and 554.37

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Solution

The fourth proportional to 903.75, 1,247.21 and 554.37 is: 765.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.75 : 1,247.21 = 554.37 : x
  2. Step 2: Convert to fraction form
    903.75/1,247.21 = 554.37/x
  3. Step 3: Cross multiply
    903.75x = 1,247.21 × 554.37
  4. Step 4: Simplify right side
    903.75x = 691,413.04
  5. Step 5: Solve for x
    x = 691,413.04/903.75
  6. Step 6: Final answer
    x = 765.05

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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.