Home / 1,398,678.18-1,930,173.03-786,831.36

Finding the Fourth Proportional to 1,398,678.18, 1,930,173.03 and 786,831.36

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Solution

The fourth proportional to 1,398,678.18, 1,930,173.03 and 786,831.36 is: 1,085,825.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,678.18 : 1,930,173.03 = 786,831.36 : x
  2. Step 2: Convert to fraction form
    1,398,678.18/1,930,173.03 = 786,831.36/x
  3. Step 3: Cross multiply
    1,398,678.18x = 1,930,173.03 × 786,831.36
  4. Step 4: Simplify right side
    1,398,678.18x = 1,518,720,670,230.22
  5. Step 5: Solve for x
    x = 1,518,720,670,230.22/1,398,678.18
  6. Step 6: Final answer
    x = 1,085,825.67

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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.