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Finding the Fourth Proportional to 490,803.60, 736,059.60 and 191,111.70

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Solution

The fourth proportional to 490,803.60, 736,059.60 and 191,111.70 is: 286,610.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,803.60 : 736,059.60 = 191,111.70 : x
  2. Step 2: Convert to fraction form
    490,803.60/736,059.60 = 191,111.70/x
  3. Step 3: Cross multiply
    490,803.60x = 736,059.60 × 191,111.70
  4. Step 4: Simplify right side
    490,803.60x = 140,669,601,457.32
  5. Step 5: Solve for x
    x = 140,669,601,457.32/490,803.60
  6. Step 6: Final answer
    x = 286,610.78

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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.