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Finding the Fourth Proportional to 339,995.45, 509,990.12 and 126,756.11

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Solution

The fourth proportional to 339,995.45, 509,990.12 and 126,756.11 is: 190,133.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,995.45 : 509,990.12 = 126,756.11 : x
  2. Step 2: Convert to fraction form
    339,995.45/509,990.12 = 126,756.11/x
  3. Step 3: Cross multiply
    339,995.45x = 509,990.12 × 126,756.11
  4. Step 4: Simplify right side
    339,995.45x = 64,644,360,565.90
  5. Step 5: Solve for x
    x = 64,644,360,565.90/339,995.45
  6. Step 6: Final answer
    x = 190,133.02

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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.