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Finding the Fourth Proportional to 1,392.85, 1,922.06 and 833.63

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Solution

The fourth proportional to 1,392.85, 1,922.06 and 833.63 is: 1,150.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.85 : 1,922.06 = 833.63 : x
  2. Step 2: Convert to fraction form
    1,392.85/1,922.06 = 833.63/x
  3. Step 3: Cross multiply
    1,392.85x = 1,922.06 × 833.63
  4. Step 4: Simplify right side
    1,392.85x = 1,602,279.35
  5. Step 5: Solve for x
    x = 1,602,279.35/1,392.85
  6. Step 6: Final answer
    x = 1,150.36

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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.