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Finding the Fourth Proportional to 404,838.30, 554,625.93 and 389,698.80

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Solution

The fourth proportional to 404,838.30, 554,625.93 and 389,698.80 is: 533,884.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,838.30 : 554,625.93 = 389,698.80 : x
  2. Step 2: Convert to fraction form
    404,838.30/554,625.93 = 389,698.80/x
  3. Step 3: Cross multiply
    404,838.30x = 554,625.93 × 389,698.80
  4. Step 4: Simplify right side
    404,838.30x = 216,137,058,751.41
  5. Step 5: Solve for x
    x = 216,137,058,751.41/404,838.30
  6. Step 6: Final answer
    x = 533,884.90

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.