Home / 1,288,563.12-1,778,168.40-715,640.20

Finding the Fourth Proportional to 1,288,563.12, 1,778,168.40 and 715,640.20

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Solution

The fourth proportional to 1,288,563.12, 1,778,168.40 and 715,640.20 is: 987,556.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,563.12 : 1,778,168.40 = 715,640.20 : x
  2. Step 2: Convert to fraction form
    1,288,563.12/1,778,168.40 = 715,640.20/x
  3. Step 3: Cross multiply
    1,288,563.12x = 1,778,168.40 × 715,640.20
  4. Step 4: Simplify right side
    1,288,563.12x = 1,272,528,789,409.68
  5. Step 5: Solve for x
    x = 1,272,528,789,409.68/1,288,563.12
  6. Step 6: Final answer
    x = 987,556.43

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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.