Home / 680,485.20-1,020,727.80-280,920.30

Finding the Fourth Proportional to 680,485.20, 1,020,727.80 and 280,920.30

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Solution

The fourth proportional to 680,485.20, 1,020,727.80 and 280,920.30 is: 421,380.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,485.20 : 1,020,727.80 = 280,920.30 : x
  2. Step 2: Convert to fraction form
    680,485.20/1,020,727.80 = 280,920.30/x
  3. Step 3: Cross multiply
    680,485.20x = 1,020,727.80 × 280,920.30
  4. Step 4: Simplify right side
    680,485.20x = 286,743,159,794.34
  5. Step 5: Solve for x
    x = 286,743,159,794.34/680,485.20
  6. Step 6: Final answer
    x = 421,380.45

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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.