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Finding the Fourth Proportional to 490,391.28, 735,674.40 and 191,034.72

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Solution

The fourth proportional to 490,391.28, 735,674.40 and 191,034.72 is: 286,586.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,391.28 : 735,674.40 = 191,034.72 : x
  2. Step 2: Convert to fraction form
    490,391.28/735,674.40 = 191,034.72/x
  3. Step 3: Cross multiply
    490,391.28x = 735,674.40 × 191,034.72
  4. Step 4: Simplify right side
    490,391.28x = 140,539,353,015.17
  5. Step 5: Solve for x
    x = 140,539,353,015.17/490,391.28
  6. Step 6: Final answer
    x = 286,586.16

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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.