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Finding the Fourth Proportional to 930.94, 1,395.03 and 621.73

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Solution

The fourth proportional to 930.94, 1,395.03 and 621.73 is: 931.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.94 : 1,395.03 = 621.73 : x
  2. Step 2: Convert to fraction form
    930.94/1,395.03 = 621.73/x
  3. Step 3: Cross multiply
    930.94x = 1,395.03 × 621.73
  4. Step 4: Simplify right side
    930.94x = 867,332.00
  5. Step 5: Solve for x
    x = 867,332.00/930.94
  6. Step 6: Final answer
    x = 931.67

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Double scale
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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.