Home / 678,633.18-936,303.72-392,048.70

Finding the Fourth Proportional to 678,633.18, 936,303.72 and 392,048.70

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Solution

The fourth proportional to 678,633.18, 936,303.72 and 392,048.70 is: 540,905.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,633.18 : 936,303.72 = 392,048.70 : x
  2. Step 2: Convert to fraction form
    678,633.18/936,303.72 = 392,048.70/x
  3. Step 3: Cross multiply
    678,633.18x = 936,303.72 × 392,048.70
  4. Step 4: Simplify right side
    678,633.18x = 367,076,656,231.16
  5. Step 5: Solve for x
    x = 367,076,656,231.16/678,633.18
  6. Step 6: Final answer
    x = 540,905.85

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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.