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Finding the Fourth Proportional to 903.87, 1,247.04 and 549.50

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Solution

The fourth proportional to 903.87, 1,247.04 and 549.50 is: 758.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.87 : 1,247.04 = 549.50 : x
  2. Step 2: Convert to fraction form
    903.87/1,247.04 = 549.50/x
  3. Step 3: Cross multiply
    903.87x = 1,247.04 × 549.50
  4. Step 4: Simplify right side
    903.87x = 685,242.24
  5. Step 5: Solve for x
    x = 685,242.24/903.87
  6. Step 6: Final answer
    x = 758.12

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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.