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Finding the Fourth Proportional to 879,057, 1,213,099.20 and 476,649

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Solution

The fourth proportional to 879,057, 1,213,099.20 and 476,649 is: 657,775.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,057 : 1,213,099.20 = 476,649 : x
  2. Step 2: Convert to fraction form
    879,057/1,213,099.20 = 476,649/x
  3. Step 3: Cross multiply
    879,057x = 1,213,099.20 × 476,649
  4. Step 4: Simplify right side
    879,057x = 578,222,520,580.80
  5. Step 5: Solve for x
    x = 578,222,520,580.80/879,057
  6. Step 6: Final answer
    x = 657,775.91

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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.