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Finding the Fourth Proportional to 509,969.80, 765,069.90 and 299,499.40

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Solution

The fourth proportional to 509,969.80, 765,069.90 and 299,499.40 is: 449,316.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,969.80 : 765,069.90 = 299,499.40 : x
  2. Step 2: Convert to fraction form
    509,969.80/765,069.90 = 299,499.40/x
  3. Step 3: Cross multiply
    509,969.80x = 765,069.90 × 299,499.40
  4. Step 4: Simplify right side
    509,969.80x = 229,137,976,008.06
  5. Step 5: Solve for x
    x = 229,137,976,008.06/509,969.80
  6. Step 6: Final answer
    x = 449,316.76

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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.