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Finding the Fourth Proportional to 409,722.60, 614,670.30 and 172,943.40

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Solution

The fourth proportional to 409,722.60, 614,670.30 and 172,943.40 is: 259,451.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,722.60 : 614,670.30 = 172,943.40 : x
  2. Step 2: Convert to fraction form
    409,722.60/614,670.30 = 172,943.40/x
  3. Step 3: Cross multiply
    409,722.60x = 614,670.30 × 172,943.40
  4. Step 4: Simplify right side
    409,722.60x = 106,303,171,561.02
  5. Step 5: Solve for x
    x = 106,303,171,561.02/409,722.60
  6. Step 6: Final answer
    x = 259,451.57

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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.