Home / 1,389,957.74-1,918,127.03-778,115.54

Finding the Fourth Proportional to 1,389,957.74, 1,918,127.03 and 778,115.54

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Solution

The fourth proportional to 1,389,957.74, 1,918,127.03 and 778,115.54 is: 1,073,791.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,957.74 : 1,918,127.03 = 778,115.54 : x
  2. Step 2: Convert to fraction form
    1,389,957.74/1,918,127.03 = 778,115.54/x
  3. Step 3: Cross multiply
    1,389,957.74x = 1,918,127.03 × 778,115.54
  4. Step 4: Simplify right side
    1,389,957.74x = 1,492,524,436,255.83
  5. Step 5: Solve for x
    x = 1,492,524,436,255.83/1,389,957.74
  6. Step 6: Final answer
    x = 1,073,791.23

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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.