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Finding the Fourth Proportional to 703.62, 1,056.65 and 669.60

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Solution

The fourth proportional to 703.62, 1,056.65 and 669.60 is: 1,005.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.62 : 1,056.65 = 669.60 : x
  2. Step 2: Convert to fraction form
    703.62/1,056.65 = 669.60/x
  3. Step 3: Cross multiply
    703.62x = 1,056.65 × 669.60
  4. Step 4: Simplify right side
    703.62x = 707,529.49
  5. Step 5: Solve for x
    x = 707,529.49/703.62
  6. Step 6: Final answer
    x = 1,005.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.