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Finding the Fourth Proportional to 942.44, 1,300.80 and 549.72

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Solution

The fourth proportional to 942.44, 1,300.80 and 549.72 is: 758.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.44 : 1,300.80 = 549.72 : x
  2. Step 2: Convert to fraction form
    942.44/1,300.80 = 549.72/x
  3. Step 3: Cross multiply
    942.44x = 1,300.80 × 549.72
  4. Step 4: Simplify right side
    942.44x = 715,075.78
  5. Step 5: Solve for x
    x = 715,075.78/942.44
  6. Step 6: Final answer
    x = 758.75

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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.