Home / 497,020.15-685,890.43-290,408.79

Finding the Fourth Proportional to 497,020.15, 685,890.43 and 290,408.79

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Solution

The fourth proportional to 497,020.15, 685,890.43 and 290,408.79 is: 400,765.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    497,020.15 : 685,890.43 = 290,408.79 : x
  2. Step 2: Convert to fraction form
    497,020.15/685,890.43 = 290,408.79/x
  3. Step 3: Cross multiply
    497,020.15x = 685,890.43 × 290,408.79
  4. Step 4: Simplify right side
    497,020.15x = 199,188,613,328.50
  5. Step 5: Solve for x
    x = 199,188,613,328.50/497,020.15
  6. Step 6: Final answer
    x = 400,765.67

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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.