Home / 1,388.12-1,913.40-1,092.92

Finding the Fourth Proportional to 1,388.12, 1,913.40 and 1,092.92

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Solution

The fourth proportional to 1,388.12, 1,913.40 and 1,092.92 is: 1,506.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388.12 : 1,913.40 = 1,092.92 : x
  2. Step 2: Convert to fraction form
    1,388.12/1,913.40 = 1,092.92/x
  3. Step 3: Cross multiply
    1,388.12x = 1,913.40 × 1,092.92
  4. Step 4: Simplify right side
    1,388.12x = 2,091,193.13
  5. Step 5: Solve for x
    x = 2,091,193.13/1,388.12
  6. Step 6: Final answer
    x = 1,506.49

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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.