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Finding the Fourth Proportional to 439,911.20, 660,039.60 and 173,626.40

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Solution

The fourth proportional to 439,911.20, 660,039.60 and 173,626.40 is: 260,507.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,911.20 : 660,039.60 = 173,626.40 : x
  2. Step 2: Convert to fraction form
    439,911.20/660,039.60 = 173,626.40/x
  3. Step 3: Cross multiply
    439,911.20x = 660,039.60 × 173,626.40
  4. Step 4: Simplify right side
    439,911.20x = 114,600,299,605.44
  5. Step 5: Solve for x
    x = 114,600,299,605.44/439,911.20
  6. Step 6: Final answer
    x = 260,507.80

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1.5x scale

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.