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Finding the Fourth Proportional to 621,698.64, 857,919.12 and 349,771.92

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Solution

The fourth proportional to 621,698.64, 857,919.12 and 349,771.92 is: 482,671.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,698.64 : 857,919.12 = 349,771.92 : x
  2. Step 2: Convert to fraction form
    621,698.64/857,919.12 = 349,771.92/x
  3. Step 3: Cross multiply
    621,698.64x = 857,919.12 × 349,771.92
  4. Step 4: Simplify right side
    621,698.64x = 300,076,017,807.11
  5. Step 5: Solve for x
    x = 300,076,017,807.11/621,698.64
  6. Step 6: Final answer
    x = 482,671.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.