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Finding the Fourth Proportional to 890.13, 1,334.18 and 556.73

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Solution

The fourth proportional to 890.13, 1,334.18 and 556.73 is: 834.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.13 : 1,334.18 = 556.73 : x
  2. Step 2: Convert to fraction form
    890.13/1,334.18 = 556.73/x
  3. Step 3: Cross multiply
    890.13x = 1,334.18 × 556.73
  4. Step 4: Simplify right side
    890.13x = 742,782.76
  5. Step 5: Solve for x
    x = 742,782.76/890.13
  6. Step 6: Final answer
    x = 834.47

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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.