Home / 678,621.15-936,287.19-392,036.67

Finding the Fourth Proportional to 678,621.15, 936,287.19 and 392,036.67

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Solution

The fourth proportional to 678,621.15, 936,287.19 and 392,036.67 is: 540,889.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,621.15 : 936,287.19 = 392,036.67 : x
  2. Step 2: Convert to fraction form
    678,621.15/936,287.19 = 392,036.67/x
  3. Step 3: Cross multiply
    678,621.15x = 936,287.19 × 392,036.67
  4. Step 4: Simplify right side
    678,621.15x = 367,058,912,131.26
  5. Step 5: Solve for x
    x = 367,058,912,131.26/678,621.15
  6. Step 6: Final answer
    x = 540,889.29

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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.