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Finding the Fourth Proportional to 403,374.20, 605,061.30 and 338,420.30

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Solution

The fourth proportional to 403,374.20, 605,061.30 and 338,420.30 is: 507,630.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,374.20 : 605,061.30 = 338,420.30 : x
  2. Step 2: Convert to fraction form
    403,374.20/605,061.30 = 338,420.30/x
  3. Step 3: Cross multiply
    403,374.20x = 605,061.30 × 338,420.30
  4. Step 4: Simplify right side
    403,374.20x = 204,765,026,664.39
  5. Step 5: Solve for x
    x = 204,765,026,664.39/403,374.20
  6. Step 6: Final answer
    x = 507,630.45

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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.