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Finding the Fourth Proportional to 669.77, 1,004.20 and 464.74

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Solution

The fourth proportional to 669.77, 1,004.20 and 464.74 is: 696.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.77 : 1,004.20 = 464.74 : x
  2. Step 2: Convert to fraction form
    669.77/1,004.20 = 464.74/x
  3. Step 3: Cross multiply
    669.77x = 1,004.20 × 464.74
  4. Step 4: Simplify right side
    669.77x = 466,688.24
  5. Step 5: Solve for x
    x = 466,688.24/669.77
  6. Step 6: Final answer
    x = 696.79

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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.