Home / 679,990.20-1,020,236.40-280,665.60

Finding the Fourth Proportional to 679,990.20, 1,020,236.40 and 280,665.60

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Solution

The fourth proportional to 679,990.20, 1,020,236.40 and 280,665.60 is: 421,102.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,990.20 : 1,020,236.40 = 280,665.60 : x
  2. Step 2: Convert to fraction form
    679,990.20/1,020,236.40 = 280,665.60/x
  3. Step 3: Cross multiply
    679,990.20x = 1,020,236.40 × 280,665.60
  4. Step 4: Simplify right side
    679,990.20x = 286,345,261,347.84
  5. Step 5: Solve for x
    x = 286,345,261,347.84/679,990.20
  6. Step 6: Final answer
    x = 421,102.04

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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.