Home / 1,246.90-1,870.35-1,212.34

Finding the Fourth Proportional to 1,246.90, 1,870.35 and 1,212.34

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Solution

The fourth proportional to 1,246.90, 1,870.35 and 1,212.34 is: 1,818.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.90 : 1,870.35 = 1,212.34 : x
  2. Step 2: Convert to fraction form
    1,246.90/1,870.35 = 1,212.34/x
  3. Step 3: Cross multiply
    1,246.90x = 1,870.35 × 1,212.34
  4. Step 4: Simplify right side
    1,246.90x = 2,267,500.12
  5. Step 5: Solve for x
    x = 2,267,500.12/1,246.90
  6. Step 6: Final answer
    x = 1,818.51

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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.