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Finding the Fourth Proportional to 669.50, 1,004.36 and 340.54

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Solution

The fourth proportional to 669.50, 1,004.36 and 340.54 is: 510.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.50 : 1,004.36 = 340.54 : x
  2. Step 2: Convert to fraction form
    669.50/1,004.36 = 340.54/x
  3. Step 3: Cross multiply
    669.50x = 1,004.36 × 340.54
  4. Step 4: Simplify right side
    669.50x = 342,024.75
  5. Step 5: Solve for x
    x = 342,024.75/669.50
  6. Step 6: Final answer
    x = 510.87

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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.