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Finding the Fourth Proportional to 917.43, 1,376.37 and 369.97

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Solution

The fourth proportional to 917.43, 1,376.37 and 369.97 is: 555.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.43 : 1,376.37 = 369.97 : x
  2. Step 2: Convert to fraction form
    917.43/1,376.37 = 369.97/x
  3. Step 3: Cross multiply
    917.43x = 1,376.37 × 369.97
  4. Step 4: Simplify right side
    917.43x = 509,215.61
  5. Step 5: Solve for x
    x = 509,215.61/917.43
  6. Step 6: Final answer
    x = 555.05

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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.