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Finding the Fourth Proportional to 218,768.20, 307,208.60 and 218,768.20

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Solution

The fourth proportional to 218,768.20, 307,208.60 and 218,768.20 is: 307,208.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,768.20 : 307,208.60 = 218,768.20 : x
  2. Step 2: Convert to fraction form
    218,768.20/307,208.60 = 218,768.20/x
  3. Step 3: Cross multiply
    218,768.20x = 307,208.60 × 218,768.20
  4. Step 4: Simplify right side
    218,768.20x = 67,207,472,446.52
  5. Step 5: Solve for x
    x = 67,207,472,446.52/218,768.20
  6. Step 6: Final answer
    x = 307,208.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.