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Finding the Fourth Proportional to 942.56, 1,300.80 and 549.68

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Solution

The fourth proportional to 942.56, 1,300.80 and 549.68 is: 758.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.56 : 1,300.80 = 549.68 : x
  2. Step 2: Convert to fraction form
    942.56/1,300.80 = 549.68/x
  3. Step 3: Cross multiply
    942.56x = 1,300.80 × 549.68
  4. Step 4: Simplify right side
    942.56x = 715,023.74
  5. Step 5: Solve for x
    x = 715,023.74/942.56
  6. Step 6: Final answer
    x = 758.60

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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.