Home / 1,281.34-1,922.70-1,258.45

Finding the Fourth Proportional to 1,281.34, 1,922.70 and 1,258.45

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Solution

The fourth proportional to 1,281.34, 1,922.70 and 1,258.45 is: 1,888.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.34 : 1,922.70 = 1,258.45 : x
  2. Step 2: Convert to fraction form
    1,281.34/1,922.70 = 1,258.45/x
  3. Step 3: Cross multiply
    1,281.34x = 1,922.70 × 1,258.45
  4. Step 4: Simplify right side
    1,281.34x = 2,419,621.82
  5. Step 5: Solve for x
    x = 2,419,621.82/1,281.34
  6. Step 6: Final answer
    x = 1,888.35

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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.