Home / 679,749.84-1,019,760.84-380,655.72

Finding the Fourth Proportional to 679,749.84, 1,019,760.84 and 380,655.72

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Solution

The fourth proportional to 679,749.84, 1,019,760.84 and 380,655.72 is: 571,059.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,749.84 : 1,019,760.84 = 380,655.72 : x
  2. Step 2: Convert to fraction form
    679,749.84/1,019,760.84 = 380,655.72/x
  3. Step 3: Cross multiply
    679,749.84x = 1,019,760.84 × 380,655.72
  4. Step 4: Simplify right side
    679,749.84x = 388,177,796,778.01
  5. Step 5: Solve for x
    x = 388,177,796,778.01/679,749.84
  6. Step 6: Final answer
    x = 571,059.78

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1.5x scale

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.