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Finding the Fourth Proportional to 1,586.94, 2,380.39 and 612.36

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Solution

The fourth proportional to 1,586.94, 2,380.39 and 612.36 is: 918.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,586.94 : 2,380.39 = 612.36 : x
  2. Step 2: Convert to fraction form
    1,586.94/2,380.39 = 612.36/x
  3. Step 3: Cross multiply
    1,586.94x = 2,380.39 × 612.36
  4. Step 4: Simplify right side
    1,586.94x = 1,457,655.62
  5. Step 5: Solve for x
    x = 1,457,655.62/1,586.94
  6. Step 6: Final answer
    x = 918.53

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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.