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Finding the Fourth Proportional to 918.44, 1,377.21 and 370.18

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Solution

The fourth proportional to 918.44, 1,377.21 and 370.18 is: 555.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.44 : 1,377.21 = 370.18 : x
  2. Step 2: Convert to fraction form
    918.44/1,377.21 = 370.18/x
  3. Step 3: Cross multiply
    918.44x = 1,377.21 × 370.18
  4. Step 4: Simplify right side
    918.44x = 509,815.60
  5. Step 5: Solve for x
    x = 509,815.60/918.44
  6. Step 6: Final answer
    x = 555.09

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1.5x scale

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.