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Finding the Fourth Proportional to 1,093.45, 1,639.93 and 313.24

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Solution

The fourth proportional to 1,093.45, 1,639.93 and 313.24 is: 469.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,093.45 : 1,639.93 = 313.24 : x
  2. Step 2: Convert to fraction form
    1,093.45/1,639.93 = 313.24/x
  3. Step 3: Cross multiply
    1,093.45x = 1,639.93 × 313.24
  4. Step 4: Simplify right side
    1,093.45x = 513,681.91
  5. Step 5: Solve for x
    x = 513,681.91/1,093.45
  6. Step 6: Final answer
    x = 469.78

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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.