Home / 679,905.28-1,018,970.97-280,143.55

Finding the Fourth Proportional to 679,905.28, 1,018,970.97 and 280,143.55

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Solution

The fourth proportional to 679,905.28, 1,018,970.97 and 280,143.55 is: 419,849.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,905.28 : 1,018,970.97 = 280,143.55 : x
  2. Step 2: Convert to fraction form
    679,905.28/1,018,970.97 = 280,143.55/x
  3. Step 3: Cross multiply
    679,905.28x = 1,018,970.97 × 280,143.55
  4. Step 4: Simplify right side
    679,905.28x = 285,458,144,882.74
  5. Step 5: Solve for x
    x = 285,458,144,882.74/679,905.28
  6. Step 6: Final answer
    x = 419,849.87

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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.