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Finding the Fourth Proportional to 1,093.60, 1,640.15 and 313.59

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Solution

The fourth proportional to 1,093.60, 1,640.15 and 313.59 is: 470.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,093.60 : 1,640.15 = 313.59 : x
  2. Step 2: Convert to fraction form
    1,093.60/1,640.15 = 313.59/x
  3. Step 3: Cross multiply
    1,093.60x = 1,640.15 × 313.59
  4. Step 4: Simplify right side
    1,093.60x = 514,334.64
  5. Step 5: Solve for x
    x = 514,334.64/1,093.60
  6. Step 6: Final answer
    x = 470.31

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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.