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Finding the Fourth Proportional to 631,887.80, 947,831.70 and 211,163.67

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Solution

The fourth proportional to 631,887.80, 947,831.70 and 211,163.67 is: 316,745.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,887.80 : 947,831.70 = 211,163.67 : x
  2. Step 2: Convert to fraction form
    631,887.80/947,831.70 = 211,163.67/x
  3. Step 3: Cross multiply
    631,887.80x = 947,831.70 × 211,163.67
  4. Step 4: Simplify right side
    631,887.80x = 200,147,623,868.71
  5. Step 5: Solve for x
    x = 200,147,623,868.71/631,887.80
  6. Step 6: Final answer
    x = 316,745.51

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Double scale
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Similar ratio
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1.5x scale

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.