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Finding the Fourth Proportional to 904.04, 1,247.20 and 549.80

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Solution

The fourth proportional to 904.04, 1,247.20 and 549.80 is: 758.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.04 : 1,247.20 = 549.80 : x
  2. Step 2: Convert to fraction form
    904.04/1,247.20 = 549.80/x
  3. Step 3: Cross multiply
    904.04x = 1,247.20 × 549.80
  4. Step 4: Simplify right side
    904.04x = 685,710.56
  5. Step 5: Solve for x
    x = 685,710.56/904.04
  6. Step 6: Final answer
    x = 758.50

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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.