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Finding the Fourth Proportional to 438,662.80, 657,994.20 and 431,664.40

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Solution

The fourth proportional to 438,662.80, 657,994.20 and 431,664.40 is: 647,496.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,662.80 : 657,994.20 = 431,664.40 : x
  2. Step 2: Convert to fraction form
    438,662.80/657,994.20 = 431,664.40/x
  3. Step 3: Cross multiply
    438,662.80x = 657,994.20 × 431,664.40
  4. Step 4: Simplify right side
    438,662.80x = 284,032,671,546.48
  5. Step 5: Solve for x
    x = 284,032,671,546.48/438,662.80
  6. Step 6: Final answer
    x = 647,496.60

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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.