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Finding the Fourth Proportional to 209,465.60, 314,198.40 and 206,355.20

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Solution

The fourth proportional to 209,465.60, 314,198.40 and 206,355.20 is: 309,532.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,465.60 : 314,198.40 = 206,355.20 : x
  2. Step 2: Convert to fraction form
    209,465.60/314,198.40 = 206,355.20/x
  3. Step 3: Cross multiply
    209,465.60x = 314,198.40 × 206,355.20
  4. Step 4: Simplify right side
    209,465.60x = 64,836,473,671.68
  5. Step 5: Solve for x
    x = 64,836,473,671.68/209,465.60
  6. Step 6: Final answer
    x = 309,532.80

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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.