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Finding the Fourth Proportional to 628,011.40, 942,164.10 and 207,286.86

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Solution

The fourth proportional to 628,011.40, 942,164.10 and 207,286.86 is: 310,978.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,011.40 : 942,164.10 = 207,286.86 : x
  2. Step 2: Convert to fraction form
    628,011.40/942,164.10 = 207,286.86/x
  3. Step 3: Cross multiply
    628,011.40x = 942,164.10 × 207,286.86
  4. Step 4: Simplify right side
    628,011.40x = 195,298,237,893.73
  5. Step 5: Solve for x
    x = 195,298,237,893.73/628,011.40
  6. Step 6: Final answer
    x = 310,978.81

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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.