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Finding the Fourth Proportional to 1,098,433, 1,515,860.58 and 621,505

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Solution

The fourth proportional to 1,098,433, 1,515,860.58 and 621,505 is: 857,689.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098,433 : 1,515,860.58 = 621,505 : x
  2. Step 2: Convert to fraction form
    1,098,433/1,515,860.58 = 621,505/x
  3. Step 3: Cross multiply
    1,098,433x = 1,515,860.58 × 621,505
  4. Step 4: Simplify right side
    1,098,433x = 942,114,929,772.90
  5. Step 5: Solve for x
    x = 942,114,929,772.90/1,098,433
  6. Step 6: Final answer
    x = 857,689.94

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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.