Home / 1,831.44-2,530.89-1,388.55

Finding the Fourth Proportional to 1,831.44, 2,530.89 and 1,388.55

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Solution

The fourth proportional to 1,831.44, 2,530.89 and 1,388.55 is: 1,918.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,831.44 : 2,530.89 = 1,388.55 : x
  2. Step 2: Convert to fraction form
    1,831.44/2,530.89 = 1,388.55/x
  3. Step 3: Cross multiply
    1,831.44x = 2,530.89 × 1,388.55
  4. Step 4: Simplify right side
    1,831.44x = 3,514,267.31
  5. Step 5: Solve for x
    x = 3,514,267.31/1,831.44
  6. Step 6: Final answer
    x = 1,918.85

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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.