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Finding the Fourth Proportional to 1,586.96, 2,380.80 and 491.36

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Solution

The fourth proportional to 1,586.96, 2,380.80 and 491.36 is: 737.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,586.96 : 2,380.80 = 491.36 : x
  2. Step 2: Convert to fraction form
    1,586.96/2,380.80 = 491.36/x
  3. Step 3: Cross multiply
    1,586.96x = 2,380.80 × 491.36
  4. Step 4: Simplify right side
    1,586.96x = 1,169,829.89
  5. Step 5: Solve for x
    x = 1,169,829.89/1,586.96
  6. Step 6: Final answer
    x = 737.15

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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.