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Finding the Fourth Proportional to 918.92, 1,377.23 and 370.80

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Solution

The fourth proportional to 918.92, 1,377.23 and 370.80 is: 555.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.92 : 1,377.23 = 370.80 : x
  2. Step 2: Convert to fraction form
    918.92/1,377.23 = 370.80/x
  3. Step 3: Cross multiply
    918.92x = 1,377.23 × 370.80
  4. Step 4: Simplify right side
    918.92x = 510,675.03
  5. Step 5: Solve for x
    x = 510,675.03/918.92
  6. Step 6: Final answer
    x = 555.73

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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.