Home / 496,631.76-685,142.80-312,544.20

Finding the Fourth Proportional to 496,631.76, 685,142.80 and 312,544.20

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Solution

The fourth proportional to 496,631.76, 685,142.80 and 312,544.20 is: 431,179.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,631.76 : 685,142.80 = 312,544.20 : x
  2. Step 2: Convert to fraction form
    496,631.76/685,142.80 = 312,544.20/x
  3. Step 3: Cross multiply
    496,631.76x = 685,142.80 × 312,544.20
  4. Step 4: Simplify right side
    496,631.76x = 214,137,408,311.76
  5. Step 5: Solve for x
    x = 214,137,408,311.76/496,631.76
  6. Step 6: Final answer
    x = 431,179.45

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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.