Home / 715,527,781.92-987,422,399.04-402,263,389.12

Finding the Fourth Proportional to 715,527,781.92, 987,422,399.04 and 402,263,389.12

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Solution

The fourth proportional to 715,527,781.92, 987,422,399.04 and 402,263,389.12 is: 555,120,137.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,527,781.92 : 987,422,399.04 = 402,263,389.12 : x
  2. Step 2: Convert to fraction form
    715,527,781.92/987,422,399.04 = 402,263,389.12/x
  3. Step 3: Cross multiply
    715,527,781.92x = 987,422,399.04 × 402,263,389.12
  4. Step 4: Simplify right side
    715,527,781.92x = 397,203,880,730,831,424
  5. Step 5: Solve for x
    x = 397,203,880,730,831,424/715,527,781.92
  6. Step 6: Final answer
    x = 555,120,137.56

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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.