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Finding the Fourth Proportional to 703.92, 1,050.46 and 618.60

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Solution

The fourth proportional to 703.92, 1,050.46 and 618.60 is: 923.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.92 : 1,050.46 = 618.60 : x
  2. Step 2: Convert to fraction form
    703.92/1,050.46 = 618.60/x
  3. Step 3: Cross multiply
    703.92x = 1,050.46 × 618.60
  4. Step 4: Simplify right side
    703.92x = 649,814.56
  5. Step 5: Solve for x
    x = 649,814.56/703.92
  6. Step 6: Final answer
    x = 923.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.