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Finding the Fourth Proportional to 628,814.60, 943,221.90 and 208,035.80

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Solution

The fourth proportional to 628,814.60, 943,221.90 and 208,035.80 is: 312,053.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,814.60 : 943,221.90 = 208,035.80 : x
  2. Step 2: Convert to fraction form
    628,814.60/943,221.90 = 208,035.80/x
  3. Step 3: Cross multiply
    628,814.60x = 943,221.90 × 208,035.80
  4. Step 4: Simplify right side
    628,814.60x = 196,223,922,544.02
  5. Step 5: Solve for x
    x = 196,223,922,544.02/628,814.60
  6. Step 6: Final answer
    x = 312,053.70

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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.