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Finding the Fourth Proportional to 668,383.20, 1,002,574.80 and 416,440.80

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Solution

The fourth proportional to 668,383.20, 1,002,574.80 and 416,440.80 is: 624,661.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,383.20 : 1,002,574.80 = 416,440.80 : x
  2. Step 2: Convert to fraction form
    668,383.20/1,002,574.80 = 416,440.80/x
  3. Step 3: Cross multiply
    668,383.20x = 1,002,574.80 × 416,440.80
  4. Step 4: Simplify right side
    668,383.20x = 417,513,051,771.84
  5. Step 5: Solve for x
    x = 417,513,051,771.84/668,383.20
  6. Step 6: Final answer
    x = 624,661.20

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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.