Home / 679,904.28-1,018,969.47-280,142.55

Finding the Fourth Proportional to 679,904.28, 1,018,969.47 and 280,142.55

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Solution

The fourth proportional to 679,904.28, 1,018,969.47 and 280,142.55 is: 419,848.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,904.28 : 1,018,969.47 = 280,142.55 : x
  2. Step 2: Convert to fraction form
    679,904.28/1,018,969.47 = 280,142.55/x
  3. Step 3: Cross multiply
    679,904.28x = 1,018,969.47 × 280,142.55
  4. Step 4: Simplify right side
    679,904.28x = 285,456,705,697.95
  5. Step 5: Solve for x
    x = 285,456,705,697.95/679,904.28
  6. Step 6: Final answer
    x = 419,848.37

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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.