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Finding the Fourth Proportional to 279,992.90, 419,989.35 and 210,008.90

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Solution

The fourth proportional to 279,992.90, 419,989.35 and 210,008.90 is: 315,013.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,992.90 : 419,989.35 = 210,008.90 : x
  2. Step 2: Convert to fraction form
    279,992.90/419,989.35 = 210,008.90/x
  3. Step 3: Cross multiply
    279,992.90x = 419,989.35 × 210,008.90
  4. Step 4: Simplify right side
    279,992.90x = 88,201,501,405.22
  5. Step 5: Solve for x
    x = 88,201,501,405.22/279,992.90
  6. Step 6: Final answer
    x = 315,013.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.