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Finding the Fourth Proportional to 670,662.80, 1,005,994.20 and 172,026.80

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Solution

The fourth proportional to 670,662.80, 1,005,994.20 and 172,026.80 is: 258,040.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,662.80 : 1,005,994.20 = 172,026.80 : x
  2. Step 2: Convert to fraction form
    670,662.80/1,005,994.20 = 172,026.80/x
  3. Step 3: Cross multiply
    670,662.80x = 1,005,994.20 × 172,026.80
  4. Step 4: Simplify right side
    670,662.80x = 173,057,963,044.56
  5. Step 5: Solve for x
    x = 173,057,963,044.56/670,662.80
  6. Step 6: Final answer
    x = 258,040.20

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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.