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Finding the Fourth Proportional to 409,828.60, 614,742.90 and 407,204.20

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Solution

The fourth proportional to 409,828.60, 614,742.90 and 407,204.20 is: 610,806.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,828.60 : 614,742.90 = 407,204.20 : x
  2. Step 2: Convert to fraction form
    409,828.60/614,742.90 = 407,204.20/x
  3. Step 3: Cross multiply
    409,828.60x = 614,742.90 × 407,204.20
  4. Step 4: Simplify right side
    409,828.60x = 250,325,890,800.18
  5. Step 5: Solve for x
    x = 250,325,890,800.18/409,828.60
  6. Step 6: Final answer
    x = 610,806.30

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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.