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Finding the Fourth Proportional to 1,831.98, 2,749.05 and 678.54

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Solution

The fourth proportional to 1,831.98, 2,749.05 and 678.54 is: 1,018.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,831.98 : 2,749.05 = 678.54 : x
  2. Step 2: Convert to fraction form
    1,831.98/2,749.05 = 678.54/x
  3. Step 3: Cross multiply
    1,831.98x = 2,749.05 × 678.54
  4. Step 4: Simplify right side
    1,831.98x = 1,865,340.39
  5. Step 5: Solve for x
    x = 1,865,340.39/1,831.98
  6. Step 6: Final answer
    x = 1,018.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.