Home / 679,761.84-1,019,778.88-380,667.76

Finding the Fourth Proportional to 679,761.84, 1,019,778.88 and 380,667.76

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Solution

The fourth proportional to 679,761.84, 1,019,778.88 and 380,667.76 is: 571,077.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,761.84 : 1,019,778.88 = 380,667.76 : x
  2. Step 2: Convert to fraction form
    679,761.84/1,019,778.88 = 380,667.76/x
  3. Step 3: Cross multiply
    679,761.84x = 1,019,778.88 × 380,667.76
  4. Step 4: Simplify right side
    679,761.84x = 388,196,941,944.91
  5. Step 5: Solve for x
    x = 388,196,941,944.91/679,761.84
  6. Step 6: Final answer
    x = 571,077.87

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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.