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Finding the Fourth Proportional to 418,734.20, 628,101.30 and 353,780.30

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Solution

The fourth proportional to 418,734.20, 628,101.30 and 353,780.30 is: 530,670.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,734.20 : 628,101.30 = 353,780.30 : x
  2. Step 2: Convert to fraction form
    418,734.20/628,101.30 = 353,780.30/x
  3. Step 3: Cross multiply
    418,734.20x = 628,101.30 × 353,780.30
  4. Step 4: Simplify right side
    418,734.20x = 222,209,866,344.39
  5. Step 5: Solve for x
    x = 222,209,866,344.39/418,734.20
  6. Step 6: Final answer
    x = 530,670.45

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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.