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Finding the Fourth Proportional to 425,319.80, 638,930.10 and 355,335.80

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Solution

The fourth proportional to 425,319.80, 638,930.10 and 355,335.80 is: 533,797.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,319.80 : 638,930.10 = 355,335.80 : x
  2. Step 2: Convert to fraction form
    425,319.80/638,930.10 = 355,335.80/x
  3. Step 3: Cross multiply
    425,319.80x = 638,930.10 × 355,335.80
  4. Step 4: Simplify right side
    425,319.80x = 227,034,738,227.58
  5. Step 5: Solve for x
    x = 227,034,738,227.58/425,319.80
  6. Step 6: Final answer
    x = 533,797.72

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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.