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Finding the Fourth Proportional to 1,392.63, 2,080.18 and 1,019.13

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Solution

The fourth proportional to 1,392.63, 2,080.18 and 1,019.13 is: 1,522.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.63 : 2,080.18 = 1,019.13 : x
  2. Step 2: Convert to fraction form
    1,392.63/2,080.18 = 1,019.13/x
  3. Step 3: Cross multiply
    1,392.63x = 2,080.18 × 1,019.13
  4. Step 4: Simplify right side
    1,392.63x = 2,119,973.84
  5. Step 5: Solve for x
    x = 2,119,973.84/1,392.63
  6. Step 6: Final answer
    x = 1,522.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.