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Finding the Fourth Proportional to 863.91, 1,192.05 and 569.88

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Solution

The fourth proportional to 863.91, 1,192.05 and 569.88 is: 786.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.91 : 1,192.05 = 569.88 : x
  2. Step 2: Convert to fraction form
    863.91/1,192.05 = 569.88/x
  3. Step 3: Cross multiply
    863.91x = 1,192.05 × 569.88
  4. Step 4: Simplify right side
    863.91x = 679,325.45
  5. Step 5: Solve for x
    x = 679,325.45/863.91
  6. Step 6: Final answer
    x = 786.34

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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.