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Finding the Fourth Proportional to 309,519.20, 434,114.20 and 309,519.20

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Solution

The fourth proportional to 309,519.20, 434,114.20 and 309,519.20 is: 434,114.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,519.20 : 434,114.20 = 309,519.20 : x
  2. Step 2: Convert to fraction form
    309,519.20/434,114.20 = 309,519.20/x
  3. Step 3: Cross multiply
    309,519.20x = 434,114.20 × 309,519.20
  4. Step 4: Simplify right side
    309,519.20x = 134,366,679,892.64
  5. Step 5: Solve for x
    x = 134,366,679,892.64/309,519.20
  6. Step 6: Final answer
    x = 434,114.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.