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Finding the Fourth Proportional to 1,296,387.02, 1,789,014.42 and 715,610.48

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Solution

The fourth proportional to 1,296,387.02, 1,789,014.42 and 715,610.48 is: 987,542.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296,387.02 : 1,789,014.42 = 715,610.48 : x
  2. Step 2: Convert to fraction form
    1,296,387.02/1,789,014.42 = 715,610.48/x
  3. Step 3: Cross multiply
    1,296,387.02x = 1,789,014.42 × 715,610.48
  4. Step 4: Simplify right side
    1,296,387.02x = 1,280,237,467,823.12
  5. Step 5: Solve for x
    x = 1,280,237,467,823.12/1,296,387.02
  6. Step 6: Final answer
    x = 987,542.65

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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.