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Finding the Fourth Proportional to 942.87, 1,300.54 and 611.72

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Solution

The fourth proportional to 942.87, 1,300.54 and 611.72 is: 843.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.87 : 1,300.54 = 611.72 : x
  2. Step 2: Convert to fraction form
    942.87/1,300.54 = 611.72/x
  3. Step 3: Cross multiply
    942.87x = 1,300.54 × 611.72
  4. Step 4: Simplify right side
    942.87x = 795,566.33
  5. Step 5: Solve for x
    x = 795,566.33/942.87
  6. Step 6: Final answer
    x = 843.77

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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.