Home / 522,285,847.21-720,754,464.63-287,331,465.43

Finding the Fourth Proportional to 522,285,847.21, 720,754,464.63 and 287,331,465.43

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Solution

The fourth proportional to 522,285,847.21, 720,754,464.63 and 287,331,465.43 is: 396,517,419.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,285,847.21 : 720,754,464.63 = 287,331,465.43 : x
  2. Step 2: Convert to fraction form
    522,285,847.21/720,754,464.63 = 287,331,465.43/x
  3. Step 3: Cross multiply
    522,285,847.21x = 720,754,464.63 × 287,331,465.43
  4. Step 4: Simplify right side
    522,285,847.21x = 207,095,436,537,352,992
  5. Step 5: Solve for x
    x = 207,095,436,537,352,992/522,285,847.21
  6. Step 6: Final answer
    x = 396,517,419.81

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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.