Home / 1,239.45-1,848.23-1,228.32

Finding the Fourth Proportional to 1,239.45, 1,848.23 and 1,228.32

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Solution

The fourth proportional to 1,239.45, 1,848.23 and 1,228.32 is: 1,831.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.45 : 1,848.23 = 1,228.32 : x
  2. Step 2: Convert to fraction form
    1,239.45/1,848.23 = 1,228.32/x
  3. Step 3: Cross multiply
    1,239.45x = 1,848.23 × 1,228.32
  4. Step 4: Simplify right side
    1,239.45x = 2,270,211.73
  5. Step 5: Solve for x
    x = 2,270,211.73/1,239.45
  6. Step 6: Final answer
    x = 1,831.63

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.