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Finding the Fourth Proportional to 942.50, 1,300.77 and 549.78

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Solution

The fourth proportional to 942.50, 1,300.77 and 549.78 is: 758.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.50 : 1,300.77 = 549.78 : x
  2. Step 2: Convert to fraction form
    942.50/1,300.77 = 549.78/x
  3. Step 3: Cross multiply
    942.50x = 1,300.77 × 549.78
  4. Step 4: Simplify right side
    942.50x = 715,137.33
  5. Step 5: Solve for x
    x = 715,137.33/942.50
  6. Step 6: Final answer
    x = 758.77

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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.