Home / 680,618.87-1,020,928.61-280,820.21

Finding the Fourth Proportional to 680,618.87, 1,020,928.61 and 280,820.21

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Solution

The fourth proportional to 680,618.87, 1,020,928.61 and 280,820.21 is: 421,230.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,618.87 : 1,020,928.61 = 280,820.21 : x
  2. Step 2: Convert to fraction form
    680,618.87/1,020,928.61 = 280,820.21/x
  3. Step 3: Cross multiply
    680,618.87x = 1,020,928.61 × 280,820.21
  4. Step 4: Simplify right side
    680,618.87x = 286,697,389,909.58
  5. Step 5: Solve for x
    x = 286,697,389,909.58/680,618.87
  6. Step 6: Final answer
    x = 421,230.45

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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.