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Finding the Fourth Proportional to 496,595.91, 685,220.67 and 312,805.92

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Solution

The fourth proportional to 496,595.91, 685,220.67 and 312,805.92 is: 431,620.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,595.91 : 685,220.67 = 312,805.92 : x
  2. Step 2: Convert to fraction form
    496,595.91/685,220.67 = 312,805.92/x
  3. Step 3: Cross multiply
    496,595.91x = 685,220.67 × 312,805.92
  4. Step 4: Simplify right side
    496,595.91x = 214,341,082,082.37
  5. Step 5: Solve for x
    x = 214,341,082,082.37/496,595.91
  6. Step 6: Final answer
    x = 431,620.72

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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.