Home / 678,845.12-936,702.23-392,309.91

Finding the Fourth Proportional to 678,845.12, 936,702.23 and 392,309.91

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Solution

The fourth proportional to 678,845.12, 936,702.23 and 392,309.91 is: 541,327.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,845.12 : 936,702.23 = 392,309.91 : x
  2. Step 2: Convert to fraction form
    678,845.12/936,702.23 = 392,309.91/x
  3. Step 3: Cross multiply
    678,845.12x = 936,702.23 × 392,309.91
  4. Step 4: Simplify right side
    678,845.12x = 367,477,565,586.55
  5. Step 5: Solve for x
    x = 367,477,565,586.55/678,845.12
  6. Step 6: Final answer
    x = 541,327.55

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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.