Home / 318,020.99-438,606.09-215,878.57

Finding the Fourth Proportional to 318,020.99, 438,606.09 and 215,878.57

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Solution

The fourth proportional to 318,020.99, 438,606.09 and 215,878.57 is: 297,733.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,020.99 : 438,606.09 = 215,878.57 : x
  2. Step 2: Convert to fraction form
    318,020.99/438,606.09 = 215,878.57/x
  3. Step 3: Cross multiply
    318,020.99x = 438,606.09 × 215,878.57
  4. Step 4: Simplify right side
    318,020.99x = 94,685,654,405.98
  5. Step 5: Solve for x
    x = 94,685,654,405.98/318,020.99
  6. Step 6: Final answer
    x = 297,733.98

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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.