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Finding the Fourth Proportional to 833.25, 1,248.21 and 415.53

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Solution

The fourth proportional to 833.25, 1,248.21 and 415.53 is: 622.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.25 : 1,248.21 = 415.53 : x
  2. Step 2: Convert to fraction form
    833.25/1,248.21 = 415.53/x
  3. Step 3: Cross multiply
    833.25x = 1,248.21 × 415.53
  4. Step 4: Simplify right side
    833.25x = 518,668.70
  5. Step 5: Solve for x
    x = 518,668.70/833.25
  6. Step 6: Final answer
    x = 622.46

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1.5x scale

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.