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Finding the Fourth Proportional to 666,050.80, 999,076.20 and 386,114.80

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Solution

The fourth proportional to 666,050.80, 999,076.20 and 386,114.80 is: 579,172.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,050.80 : 999,076.20 = 386,114.80 : x
  2. Step 2: Convert to fraction form
    666,050.80/999,076.20 = 386,114.80/x
  3. Step 3: Cross multiply
    666,050.80x = 999,076.20 × 386,114.80
  4. Step 4: Simplify right side
    666,050.80x = 385,758,107,147.76
  5. Step 5: Solve for x
    x = 385,758,107,147.76/666,050.80
  6. Step 6: Final answer
    x = 579,172.20

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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.