Home / 317,721.72-438,213-215,825.73

Finding the Fourth Proportional to 317,721.72, 438,213 and 215,825.73

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Solution

The fourth proportional to 317,721.72, 438,213 and 215,825.73 is: 297,674.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,721.72 : 438,213 = 215,825.73 : x
  2. Step 2: Convert to fraction form
    317,721.72/438,213 = 215,825.73/x
  3. Step 3: Cross multiply
    317,721.72x = 438,213 × 215,825.73
  4. Step 4: Simplify right side
    317,721.72x = 94,577,640,620.49
  5. Step 5: Solve for x
    x = 94,577,640,620.49/317,721.72
  6. Step 6: Final answer
    x = 297,674.46

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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.