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Finding the Fourth Proportional to 703.77, 1,050.78 and 660.03

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Solution

The fourth proportional to 703.77, 1,050.78 and 660.03 is: 985.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.77 : 1,050.78 = 660.03 : x
  2. Step 2: Convert to fraction form
    703.77/1,050.78 = 660.03/x
  3. Step 3: Cross multiply
    703.77x = 1,050.78 × 660.03
  4. Step 4: Simplify right side
    703.77x = 693,546.32
  5. Step 5: Solve for x
    x = 693,546.32/703.77
  6. Step 6: Final answer
    x = 985.47

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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.