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Finding the Fourth Proportional to 490,672.80, 736,009.20 and 455,243.40

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Solution

The fourth proportional to 490,672.80, 736,009.20 and 455,243.40 is: 682,865.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,672.80 : 736,009.20 = 455,243.40 : x
  2. Step 2: Convert to fraction form
    490,672.80/736,009.20 = 455,243.40/x
  3. Step 3: Cross multiply
    490,672.80x = 736,009.20 × 455,243.40
  4. Step 4: Simplify right side
    490,672.80x = 335,063,330,639.28
  5. Step 5: Solve for x
    x = 335,063,330,639.28/490,672.80
  6. Step 6: Final answer
    x = 682,865.10

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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.