Home / 879,186.78-1,318,765.77-280,139.84

Finding the Fourth Proportional to 879,186.78, 1,318,765.77 and 280,139.84

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Solution

The fourth proportional to 879,186.78, 1,318,765.77 and 280,139.84 is: 420,205.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,186.78 : 1,318,765.77 = 280,139.84 : x
  2. Step 2: Convert to fraction form
    879,186.78/1,318,765.77 = 280,139.84/x
  3. Step 3: Cross multiply
    879,186.78x = 1,318,765.77 × 280,139.84
  4. Step 4: Simplify right side
    879,186.78x = 369,438,831,805.28
  5. Step 5: Solve for x
    x = 369,438,831,805.28/879,186.78
  6. Step 6: Final answer
    x = 420,205.17

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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.