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Finding the Fourth Proportional to 439,640.98, 659,460.46 and 288,790.28

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Solution

The fourth proportional to 439,640.98, 659,460.46 and 288,790.28 is: 433,184.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,640.98 : 659,460.46 = 288,790.28 : x
  2. Step 2: Convert to fraction form
    439,640.98/659,460.46 = 288,790.28/x
  3. Step 3: Cross multiply
    439,640.98x = 659,460.46 × 288,790.28
  4. Step 4: Simplify right side
    439,640.98x = 190,445,770,892.33
  5. Step 5: Solve for x
    x = 190,445,770,892.33/439,640.98
  6. Step 6: Final answer
    x = 433,184.76

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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.