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Finding the Fourth Proportional to 261,998.40, 392,997.60 and 112,213.20

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Solution

The fourth proportional to 261,998.40, 392,997.60 and 112,213.20 is: 168,319.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,998.40 : 392,997.60 = 112,213.20 : x
  2. Step 2: Convert to fraction form
    261,998.40/392,997.60 = 112,213.20/x
  3. Step 3: Cross multiply
    261,998.40x = 392,997.60 × 112,213.20
  4. Step 4: Simplify right side
    261,998.40x = 44,099,518,288.32
  5. Step 5: Solve for x
    x = 44,099,518,288.32/261,998.40
  6. Step 6: Final answer
    x = 168,319.80

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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.