Home / 2,780.63-4,168.98-1,392.98

Finding the Fourth Proportional to 2,780.63, 4,168.98 and 1,392.98

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Solution

The fourth proportional to 2,780.63, 4,168.98 and 1,392.98 is: 2,088.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.63 : 4,168.98 = 1,392.98 : x
  2. Step 2: Convert to fraction form
    2,780.63/4,168.98 = 1,392.98/x
  3. Step 3: Cross multiply
    2,780.63x = 4,168.98 × 1,392.98
  4. Step 4: Simplify right side
    2,780.63x = 5,807,284.92
  5. Step 5: Solve for x
    x = 5,807,284.92/2,780.63
  6. Step 6: Final answer
    x = 2,088.48

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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.