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Finding the Fourth Proportional to 816.81, 1,127.70 and 606.74

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Solution

The fourth proportional to 816.81, 1,127.70 and 606.74 is: 837.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.81 : 1,127.70 = 606.74 : x
  2. Step 2: Convert to fraction form
    816.81/1,127.70 = 606.74/x
  3. Step 3: Cross multiply
    816.81x = 1,127.70 × 606.74
  4. Step 4: Simplify right side
    816.81x = 684,219.70
  5. Step 5: Solve for x
    x = 684,219.70/816.81
  6. Step 6: Final answer
    x = 837.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.