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Finding the Fourth Proportional to 1,135.91, 1,703.72 and 314.24

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Solution

The fourth proportional to 1,135.91, 1,703.72 and 314.24 is: 471.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.91 : 1,703.72 = 314.24 : x
  2. Step 2: Convert to fraction form
    1,135.91/1,703.72 = 314.24/x
  3. Step 3: Cross multiply
    1,135.91x = 1,703.72 × 314.24
  4. Step 4: Simplify right side
    1,135.91x = 535,366.88
  5. Step 5: Solve for x
    x = 535,366.88/1,135.91
  6. Step 6: Final answer
    x = 471.31

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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.