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Finding the Fourth Proportional to 207,613.80, 311,420.70 and 141,258.60

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Solution

The fourth proportional to 207,613.80, 311,420.70 and 141,258.60 is: 211,887.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,613.80 : 311,420.70 = 141,258.60 : x
  2. Step 2: Convert to fraction form
    207,613.80/311,420.70 = 141,258.60/x
  3. Step 3: Cross multiply
    207,613.80x = 311,420.70 × 141,258.60
  4. Step 4: Simplify right side
    207,613.80x = 43,990,852,093.02
  5. Step 5: Solve for x
    x = 43,990,852,093.02/207,613.80
  6. Step 6: Final answer
    x = 211,887.90

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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.