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Finding the Fourth Proportional to 3,070.80, 4,238.80 and 1,812.06

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Solution

The fourth proportional to 3,070.80, 4,238.80 and 1,812.06 is: 2,501.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,070.80 : 4,238.80 = 1,812.06 : x
  2. Step 2: Convert to fraction form
    3,070.80/4,238.80 = 1,812.06/x
  3. Step 3: Cross multiply
    3,070.80x = 4,238.80 × 1,812.06
  4. Step 4: Simplify right side
    3,070.80x = 7,680,959.93
  5. Step 5: Solve for x
    x = 7,680,959.93/3,070.80
  6. Step 6: Final answer
    x = 2,501.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.