Home / 521,831,651.87-720,128,142.90-286,886,309.69

Finding the Fourth Proportional to 521,831,651.87, 720,128,142.90 and 286,886,309.69

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Solution

The fourth proportional to 521,831,651.87, 720,128,142.90 and 286,886,309.69 is: 395,903,362.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,831,651.87 : 720,128,142.90 = 286,886,309.69 : x
  2. Step 2: Convert to fraction form
    521,831,651.87/720,128,142.90 = 286,886,309.69/x
  3. Step 3: Cross multiply
    521,831,651.87x = 720,128,142.90 × 286,886,309.69
  4. Step 4: Simplify right side
    521,831,651.87x = 206,594,905,422,294,272
  5. Step 5: Solve for x
    x = 206,594,905,422,294,272/521,831,651.87
  6. Step 6: Final answer
    x = 395,903,362.09

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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.