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Finding the Fourth Proportional to 340,468.20, 509,780.70 and 266,740.20

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Solution

The fourth proportional to 340,468.20, 509,780.70 and 266,740.20 is: 399,388.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,468.20 : 509,780.70 = 266,740.20 : x
  2. Step 2: Convert to fraction form
    340,468.20/509,780.70 = 266,740.20/x
  3. Step 3: Cross multiply
    340,468.20x = 509,780.70 × 266,740.20
  4. Step 4: Simplify right side
    340,468.20x = 135,979,005,874.14
  5. Step 5: Solve for x
    x = 135,979,005,874.14/340,468.20
  6. Step 6: Final answer
    x = 399,388.27

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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.