Home / 778,939.80-1,168,409.70-280,123.80

Finding the Fourth Proportional to 778,939.80, 1,168,409.70 and 280,123.80

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Solution

The fourth proportional to 778,939.80, 1,168,409.70 and 280,123.80 is: 420,185.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,939.80 : 1,168,409.70 = 280,123.80 : x
  2. Step 2: Convert to fraction form
    778,939.80/1,168,409.70 = 280,123.80/x
  3. Step 3: Cross multiply
    778,939.80x = 1,168,409.70 × 280,123.80
  4. Step 4: Simplify right side
    778,939.80x = 327,299,365,120.86
  5. Step 5: Solve for x
    x = 327,299,365,120.86/778,939.80
  6. Step 6: Final answer
    x = 420,185.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.