Home / 1,787.02-2,680.69-470.78

Finding the Fourth Proportional to 1,787.02, 2,680.69 and 470.78

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Solution

The fourth proportional to 1,787.02, 2,680.69 and 470.78 is: 706.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.02 : 2,680.69 = 470.78 : x
  2. Step 2: Convert to fraction form
    1,787.02/2,680.69 = 470.78/x
  3. Step 3: Cross multiply
    1,787.02x = 2,680.69 × 470.78
  4. Step 4: Simplify right side
    1,787.02x = 1,262,015.24
  5. Step 5: Solve for x
    x = 1,262,015.24/1,787.02
  6. Step 6: Final answer
    x = 706.21

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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.