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Finding the Fourth Proportional to 210,320,131.70, 315,480,197.55 and 210,320,131.70

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Solution

The fourth proportional to 210,320,131.70, 315,480,197.55 and 210,320,131.70 is: 315,480,197.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,320,131.70 : 315,480,197.55 = 210,320,131.70 : x
  2. Step 2: Convert to fraction form
    210,320,131.70/315,480,197.55 = 210,320,131.70/x
  3. Step 3: Cross multiply
    210,320,131.70x = 315,480,197.55 × 210,320,131.70
  4. Step 4: Simplify right side
    210,320,131.70x = 66,351,836,697,458,016
  5. Step 5: Solve for x
    x = 66,351,836,697,458,016/210,320,131.70
  6. Step 6: Final answer
    x = 315,480,197.55

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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.