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Finding the Fourth Proportional to 455,276.80, 682,915.20 and 139,734.40

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Solution

The fourth proportional to 455,276.80, 682,915.20 and 139,734.40 is: 209,601.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,276.80 : 682,915.20 = 139,734.40 : x
  2. Step 2: Convert to fraction form
    455,276.80/682,915.20 = 139,734.40/x
  3. Step 3: Cross multiply
    455,276.80x = 682,915.20 × 139,734.40
  4. Step 4: Simplify right side
    455,276.80x = 95,426,745,722.88
  5. Step 5: Solve for x
    x = 95,426,745,722.88/455,276.80
  6. Step 6: Final answer
    x = 209,601.60

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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.