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Finding the Fourth Proportional to 279,568.12, 385,820.22 and 210,534

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Solution

The fourth proportional to 279,568.12, 385,820.22 and 210,534 is: 290,549.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,568.12 : 385,820.22 = 210,534 : x
  2. Step 2: Convert to fraction form
    279,568.12/385,820.22 = 210,534/x
  3. Step 3: Cross multiply
    279,568.12x = 385,820.22 × 210,534
  4. Step 4: Simplify right side
    279,568.12x = 81,228,274,197.48
  5. Step 5: Solve for x
    x = 81,228,274,197.48/279,568.12
  6. Step 6: Final answer
    x = 290,549.13

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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.