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Finding the Fourth Proportional to 833.50, 1,150.21 and 455.38

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Solution

The fourth proportional to 833.50, 1,150.21 and 455.38 is: 628.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.50 : 1,150.21 = 455.38 : x
  2. Step 2: Convert to fraction form
    833.50/1,150.21 = 455.38/x
  3. Step 3: Cross multiply
    833.50x = 1,150.21 × 455.38
  4. Step 4: Simplify right side
    833.50x = 523,784.64
  5. Step 5: Solve for x
    x = 523,784.64/833.50
  6. Step 6: Final answer
    x = 628.41

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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.