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Finding the Fourth Proportional to 835.43, 1,152.14 and 669.60

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Solution

The fourth proportional to 835.43, 1,152.14 and 669.60 is: 923.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.43 : 1,152.14 = 669.60 : x
  2. Step 2: Convert to fraction form
    835.43/1,152.14 = 669.60/x
  3. Step 3: Cross multiply
    835.43x = 1,152.14 × 669.60
  4. Step 4: Simplify right side
    835.43x = 771,469.60
  5. Step 5: Solve for x
    x = 771,469.60/835.43
  6. Step 6: Final answer
    x = 923.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.