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Finding the Fourth Proportional to 340,449.20, 509,752.20 and 266,721.20

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Solution

The fourth proportional to 340,449.20, 509,752.20 and 266,721.20 is: 399,359.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,449.20 : 509,752.20 = 266,721.20 : x
  2. Step 2: Convert to fraction form
    340,449.20/509,752.20 = 266,721.20/x
  3. Step 3: Cross multiply
    340,449.20x = 509,752.20 × 266,721.20
  4. Step 4: Simplify right side
    340,449.20x = 135,961,718,486.64
  5. Step 5: Solve for x
    x = 135,961,718,486.64/340,449.20
  6. Step 6: Final answer
    x = 399,359.78

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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.