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Finding the Fourth Proportional to 890.90, 1,336.58 and 370.74

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Solution

The fourth proportional to 890.90, 1,336.58 and 370.74 is: 556.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.90 : 1,336.58 = 370.74 : x
  2. Step 2: Convert to fraction form
    890.90/1,336.58 = 370.74/x
  3. Step 3: Cross multiply
    890.90x = 1,336.58 × 370.74
  4. Step 4: Simplify right side
    890.90x = 495,517.91
  5. Step 5: Solve for x
    x = 495,517.91/890.90
  6. Step 6: Final answer
    x = 556.20

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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.