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Finding the Fourth Proportional to 340,043.80, 510,065.70 and 320,690.20

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Solution

The fourth proportional to 340,043.80, 510,065.70 and 320,690.20 is: 481,035.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,043.80 : 510,065.70 = 320,690.20 : x
  2. Step 2: Convert to fraction form
    340,043.80/510,065.70 = 320,690.20/x
  3. Step 3: Cross multiply
    340,043.80x = 510,065.70 × 320,690.20
  4. Step 4: Simplify right side
    340,043.80x = 163,573,071,346.14
  5. Step 5: Solve for x
    x = 163,573,071,346.14/340,043.80
  6. Step 6: Final answer
    x = 481,035.30

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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.