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Finding the Fourth Proportional to 439,628.20, 660,219.90 and 340,030.60

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Solution

The fourth proportional to 439,628.20, 660,219.90 and 340,030.60 is: 510,647.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,628.20 : 660,219.90 = 340,030.60 : x
  2. Step 2: Convert to fraction form
    439,628.20/660,219.90 = 340,030.60/x
  3. Step 3: Cross multiply
    439,628.20x = 660,219.90 × 340,030.60
  4. Step 4: Simplify right side
    439,628.20x = 224,494,968,728.94
  5. Step 5: Solve for x
    x = 224,494,968,728.94/439,628.20
  6. Step 6: Final answer
    x = 510,647.34

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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.