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Finding the Fourth Proportional to 403,359.40, 603,726.90 and 314,129.80

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Solution

The fourth proportional to 403,359.40, 603,726.90 and 314,129.80 is: 470,172.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,359.40 : 603,726.90 = 314,129.80 : x
  2. Step 2: Convert to fraction form
    403,359.40/603,726.90 = 314,129.80/x
  3. Step 3: Cross multiply
    403,359.40x = 603,726.90 × 314,129.80
  4. Step 4: Simplify right side
    403,359.40x = 189,648,610,351.62
  5. Step 5: Solve for x
    x = 189,648,610,351.62/403,359.40
  6. Step 6: Final answer
    x = 470,172.78

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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.