Home / 279,936,693.90-419,905,040.85-256,128,137.10

Finding the Fourth Proportional to 279,936,693.90, 419,905,040.85 and 256,128,137.10

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Solution

The fourth proportional to 279,936,693.90, 419,905,040.85 and 256,128,137.10 is: 384,192,205.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,936,693.90 : 419,905,040.85 = 256,128,137.10 : x
  2. Step 2: Convert to fraction form
    279,936,693.90/419,905,040.85 = 256,128,137.10/x
  3. Step 3: Cross multiply
    279,936,693.90x = 419,905,040.85 × 256,128,137.10
  4. Step 4: Simplify right side
    279,936,693.90x = 107,549,495,871,809,904
  5. Step 5: Solve for x
    x = 107,549,495,871,809,904/279,936,693.90
  6. Step 6: Final answer
    x = 384,192,205.65

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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.