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Finding the Fourth Proportional to 456,423.60, 684,732.60 and 140,912.40

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Solution

The fourth proportional to 456,423.60, 684,732.60 and 140,912.40 is: 211,398.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,423.60 : 684,732.60 = 140,912.40 : x
  2. Step 2: Convert to fraction form
    456,423.60/684,732.60 = 140,912.40/x
  3. Step 3: Cross multiply
    456,423.60x = 684,732.60 × 140,912.40
  4. Step 4: Simplify right side
    456,423.60x = 96,487,314,024.24
  5. Step 5: Solve for x
    x = 96,487,314,024.24/456,423.60
  6. Step 6: Final answer
    x = 211,398.61

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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.