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Finding the Fourth Proportional to 448,857.06, 619,647.21 and 279,145.86

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Solution

The fourth proportional to 448,857.06, 619,647.21 and 279,145.86 is: 385,360.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,857.06 : 619,647.21 = 279,145.86 : x
  2. Step 2: Convert to fraction form
    448,857.06/619,647.21 = 279,145.86/x
  3. Step 3: Cross multiply
    448,857.06x = 619,647.21 × 279,145.86
  4. Step 4: Simplify right side
    448,857.06x = 172,971,953,332.05
  5. Step 5: Solve for x
    x = 172,971,953,332.05/448,857.06
  6. Step 6: Final answer
    x = 385,360.88

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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.