Home / 1,290.53-1,925.67-1,212.18

Finding the Fourth Proportional to 1,290.53, 1,925.67 and 1,212.18

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Solution

The fourth proportional to 1,290.53, 1,925.67 and 1,212.18 is: 1,808.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.53 : 1,925.67 = 1,212.18 : x
  2. Step 2: Convert to fraction form
    1,290.53/1,925.67 = 1,212.18/x
  3. Step 3: Cross multiply
    1,290.53x = 1,925.67 × 1,212.18
  4. Step 4: Simplify right side
    1,290.53x = 2,334,258.66
  5. Step 5: Solve for x
    x = 2,334,258.66/1,290.53
  6. Step 6: Final answer
    x = 1,808.77

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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.