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Finding the Fourth Proportional to 262,610.40, 393,915.60 and 75,640.80

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Solution

The fourth proportional to 262,610.40, 393,915.60 and 75,640.80 is: 113,461.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,610.40 : 393,915.60 = 75,640.80 : x
  2. Step 2: Convert to fraction form
    262,610.40/393,915.60 = 75,640.80/x
  3. Step 3: Cross multiply
    262,610.40x = 393,915.60 × 75,640.80
  4. Step 4: Simplify right side
    262,610.40x = 29,796,091,116.48
  5. Step 5: Solve for x
    x = 29,796,091,116.48/262,610.40
  6. Step 6: Final answer
    x = 113,461.20

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1.5x scale

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.