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Finding the Fourth Proportional to 354,503.40, 531,755.10 and 340,725.30

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Solution

The fourth proportional to 354,503.40, 531,755.10 and 340,725.30 is: 511,087.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,503.40 : 531,755.10 = 340,725.30 : x
  2. Step 2: Convert to fraction form
    354,503.40/531,755.10 = 340,725.30/x
  3. Step 3: Cross multiply
    354,503.40x = 531,755.10 × 340,725.30
  4. Step 4: Simplify right side
    354,503.40x = 181,182,415,974.03
  5. Step 5: Solve for x
    x = 181,182,415,974.03/354,503.40
  6. Step 6: Final answer
    x = 511,087.95

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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.