Home / 1,258.42-1,880.17-1,215.35

Finding the Fourth Proportional to 1,258.42, 1,880.17 and 1,215.35

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Solution

The fourth proportional to 1,258.42, 1,880.17 and 1,215.35 is: 1,815.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258.42 : 1,880.17 = 1,215.35 : x
  2. Step 2: Convert to fraction form
    1,258.42/1,880.17 = 1,215.35/x
  3. Step 3: Cross multiply
    1,258.42x = 1,880.17 × 1,215.35
  4. Step 4: Simplify right side
    1,258.42x = 2,285,058.53
  5. Step 5: Solve for x
    x = 2,285,058.53/1,258.42
  6. Step 6: Final answer
    x = 1,815.82

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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.