Home / 1,351.52-1,865.80-911.74

Finding the Fourth Proportional to 1,351.52, 1,865.80 and 911.74

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Solution

The fourth proportional to 1,351.52, 1,865.80 and 911.74 is: 1,258.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.52 : 1,865.80 = 911.74 : x
  2. Step 2: Convert to fraction form
    1,351.52/1,865.80 = 911.74/x
  3. Step 3: Cross multiply
    1,351.52x = 1,865.80 × 911.74
  4. Step 4: Simplify right side
    1,351.52x = 1,701,124.49
  5. Step 5: Solve for x
    x = 1,701,124.49/1,351.52
  6. Step 6: Final answer
    x = 1,258.68

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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.