Home / 1,388.16-1,913.44-1,088.92

Finding the Fourth Proportional to 1,388.16, 1,913.44 and 1,088.92

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Solution

The fourth proportional to 1,388.16, 1,913.44 and 1,088.92 is: 1,500.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388.16 : 1,913.44 = 1,088.92 : x
  2. Step 2: Convert to fraction form
    1,388.16/1,913.44 = 1,088.92/x
  3. Step 3: Cross multiply
    1,388.16x = 1,913.44 × 1,088.92
  4. Step 4: Simplify right side
    1,388.16x = 2,083,583.08
  5. Step 5: Solve for x
    x = 2,083,583.08/1,388.16
  6. Step 6: Final answer
    x = 1,500.97

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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.