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Finding the Fourth Proportional to 890.76, 1,336.64 and 370.67

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Solution

The fourth proportional to 890.76, 1,336.64 and 370.67 is: 556.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.76 : 1,336.64 = 370.67 : x
  2. Step 2: Convert to fraction form
    890.76/1,336.64 = 370.67/x
  3. Step 3: Cross multiply
    890.76x = 1,336.64 × 370.67
  4. Step 4: Simplify right side
    890.76x = 495,443.81
  5. Step 5: Solve for x
    x = 495,443.81/890.76
  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.