Home / 768,729.32-1,152,093.79-312,789.20

Finding the Fourth Proportional to 768,729.32, 1,152,093.79 and 312,789.20

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Solution

The fourth proportional to 768,729.32, 1,152,093.79 and 312,789.20 is: 468,776.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,729.32 : 1,152,093.79 = 312,789.20 : x
  2. Step 2: Convert to fraction form
    768,729.32/1,152,093.79 = 312,789.20/x
  3. Step 3: Cross multiply
    768,729.32x = 1,152,093.79 × 312,789.20
  4. Step 4: Simplify right side
    768,729.32x = 360,362,494,899.07
  5. Step 5: Solve for x
    x = 360,362,494,899.07/768,729.32
  6. Step 6: Final answer
    x = 468,776.83

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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.