Home / 778,505.80-1,074,345.78-456,406.60

Finding the Fourth Proportional to 778,505.80, 1,074,345.78 and 456,406.60

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Solution

The fourth proportional to 778,505.80, 1,074,345.78 and 456,406.60 is: 629,845.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,505.80 : 1,074,345.78 = 456,406.60 : x
  2. Step 2: Convert to fraction form
    778,505.80/1,074,345.78 = 456,406.60/x
  3. Step 3: Cross multiply
    778,505.80x = 1,074,345.78 × 456,406.60
  4. Step 4: Simplify right side
    778,505.80x = 490,338,504,674.15
  5. Step 5: Solve for x
    x = 490,338,504,674.15/778,505.80
  6. Step 6: Final answer
    x = 629,845.67

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Double scale
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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.