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Finding the Fourth Proportional to 1,364.74, 2,046.48 and 817.18

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Solution

The fourth proportional to 1,364.74, 2,046.48 and 817.18 is: 1,225.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,364.74 : 2,046.48 = 817.18 : x
  2. Step 2: Convert to fraction form
    1,364.74/2,046.48 = 817.18/x
  3. Step 3: Cross multiply
    1,364.74x = 2,046.48 × 817.18
  4. Step 4: Simplify right side
    1,364.74x = 1,672,342.53
  5. Step 5: Solve for x
    x = 1,672,342.53/1,364.74
  6. Step 6: Final answer
    x = 1,225.39

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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.