Home / 505,512,139.20-758,268,208.80-287,833,905.60

Finding the Fourth Proportional to 505,512,139.20, 758,268,208.80 and 287,833,905.60

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Solution

The fourth proportional to 505,512,139.20, 758,268,208.80 and 287,833,905.60 is: 431,750,858.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,512,139.20 : 758,268,208.80 = 287,833,905.60 : x
  2. Step 2: Convert to fraction form
    505,512,139.20/758,268,208.80 = 287,833,905.60/x
  3. Step 3: Cross multiply
    505,512,139.20x = 758,268,208.80 × 287,833,905.60
  4. Step 4: Simplify right side
    505,512,139.20x = 218,255,300,031,220,288
  5. Step 5: Solve for x
    x = 218,255,300,031,220,288/505,512,139.20
  6. Step 6: Final answer
    x = 431,750,858.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.