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Finding the Fourth Proportional to 354,660.80, 531,116.40 and 265,431.20

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Solution

The fourth proportional to 354,660.80, 531,116.40 and 265,431.20 is: 397,492.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,660.80 : 531,116.40 = 265,431.20 : x
  2. Step 2: Convert to fraction form
    354,660.80/531,116.40 = 265,431.20/x
  3. Step 3: Cross multiply
    354,660.80x = 531,116.40 × 265,431.20
  4. Step 4: Simplify right side
    354,660.80x = 140,974,863,391.68
  5. Step 5: Solve for x
    x = 140,974,863,391.68/354,660.80
  6. Step 6: Final answer
    x = 397,492.09

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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.