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Finding the Fourth Proportional to 1,392.93, 1,922.13 and 803.34

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Solution

The fourth proportional to 1,392.93, 1,922.13 and 803.34 is: 1,108.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.93 : 1,922.13 = 803.34 : x
  2. Step 2: Convert to fraction form
    1,392.93/1,922.13 = 803.34/x
  3. Step 3: Cross multiply
    1,392.93x = 1,922.13 × 803.34
  4. Step 4: Simplify right side
    1,392.93x = 1,544,123.91
  5. Step 5: Solve for x
    x = 1,544,123.91/1,392.93
  6. Step 6: Final answer
    x = 1,108.54

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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.