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Finding the Fourth Proportional to 205,085.60, 307,628.40 and 197,212.40

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Solution

The fourth proportional to 205,085.60, 307,628.40 and 197,212.40 is: 295,818.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,085.60 : 307,628.40 = 197,212.40 : x
  2. Step 2: Convert to fraction form
    205,085.60/307,628.40 = 197,212.40/x
  3. Step 3: Cross multiply
    205,085.60x = 307,628.40 × 197,212.40
  4. Step 4: Simplify right side
    205,085.60x = 60,668,135,072.16
  5. Step 5: Solve for x
    x = 60,668,135,072.16/205,085.60
  6. Step 6: Final answer
    x = 295,818.60

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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.