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Finding the Fourth Proportional to 1,398.03, 1,926.95 and 1,280.37

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Solution

The fourth proportional to 1,398.03, 1,926.95 and 1,280.37 is: 1,764.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.03 : 1,926.95 = 1,280.37 : x
  2. Step 2: Convert to fraction form
    1,398.03/1,926.95 = 1,280.37/x
  3. Step 3: Cross multiply
    1,398.03x = 1,926.95 × 1,280.37
  4. Step 4: Simplify right side
    1,398.03x = 2,467,202.57
  5. Step 5: Solve for x
    x = 2,467,202.57/1,398.03
  6. Step 6: Final answer
    x = 1,764.77

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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.