Home / 678,625.15-936,292.71-392,040.67

Finding the Fourth Proportional to 678,625.15, 936,292.71 and 392,040.67

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Solution

The fourth proportional to 678,625.15, 936,292.71 and 392,040.67 is: 540,894.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,625.15 : 936,292.71 = 392,040.67 : x
  2. Step 2: Convert to fraction form
    678,625.15/936,292.71 = 392,040.67/x
  3. Step 3: Cross multiply
    678,625.15x = 936,292.71 × 392,040.67
  4. Step 4: Simplify right side
    678,625.15x = 367,064,821,344.52
  5. Step 5: Solve for x
    x = 367,064,821,344.52/678,625.15
  6. Step 6: Final answer
    x = 540,894.81

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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.