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Finding the Fourth Proportional to 1,173,978, 1,620,096.12 and 637,434

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Solution

The fourth proportional to 1,173,978, 1,620,096.12 and 637,434 is: 879,662.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173,978 : 1,620,096.12 = 637,434 : x
  2. Step 2: Convert to fraction form
    1,173,978/1,620,096.12 = 637,434/x
  3. Step 3: Cross multiply
    1,173,978x = 1,620,096.12 × 637,434
  4. Step 4: Simplify right side
    1,173,978x = 1,032,704,350,156.08
  5. Step 5: Solve for x
    x = 1,032,704,350,156.08/1,173,978
  6. Step 6: Final answer
    x = 879,662.44

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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.