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Finding the Fourth Proportional to 990,676.14, 1,486,027.87 and 280,703.49

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Solution

The fourth proportional to 990,676.14, 1,486,027.87 and 280,703.49 is: 421,059.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,676.14 : 1,486,027.87 = 280,703.49 : x
  2. Step 2: Convert to fraction form
    990,676.14/1,486,027.87 = 280,703.49/x
  3. Step 3: Cross multiply
    990,676.14x = 1,486,027.87 × 280,703.49
  4. Step 4: Simplify right side
    990,676.14x = 417,133,203,071.90
  5. Step 5: Solve for x
    x = 417,133,203,071.90/990,676.14
  6. Step 6: Final answer
    x = 421,059.10

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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.