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Finding the Fourth Proportional to 439,546.40, 659,319.60 and 421,831.70

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Solution

The fourth proportional to 439,546.40, 659,319.60 and 421,831.70 is: 632,747.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,546.40 : 659,319.60 = 421,831.70 : x
  2. Step 2: Convert to fraction form
    439,546.40/659,319.60 = 421,831.70/x
  3. Step 3: Cross multiply
    439,546.40x = 659,319.60 × 421,831.70
  4. Step 4: Simplify right side
    439,546.40x = 278,121,907,711.32
  5. Step 5: Solve for x
    x = 278,121,907,711.32/439,546.40
  6. Step 6: Final answer
    x = 632,747.55

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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.