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Finding the Fourth Proportional to 212,579.40, 320,837.43 and 212,579.40

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Solution

The fourth proportional to 212,579.40, 320,837.43 and 212,579.40 is: 320,837.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,579.40 : 320,837.43 = 212,579.40 : x
  2. Step 2: Convert to fraction form
    212,579.40/320,837.43 = 212,579.40/x
  3. Step 3: Cross multiply
    212,579.40x = 320,837.43 × 212,579.40
  4. Step 4: Simplify right side
    212,579.40x = 68,203,428,366.94
  5. Step 5: Solve for x
    x = 68,203,428,366.94/212,579.40
  6. Step 6: Final answer
    x = 320,837.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.