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Finding the Fourth Proportional to 448,859.81, 619,651.01 and 279,148.61

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Solution

The fourth proportional to 448,859.81, 619,651.01 and 279,148.61 is: 385,364.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,859.81 : 619,651.01 = 279,148.61 : x
  2. Step 2: Convert to fraction form
    448,859.81/619,651.01 = 279,148.61/x
  3. Step 3: Cross multiply
    448,859.81x = 619,651.01 × 279,148.61
  4. Step 4: Simplify right side
    448,859.81x = 172,974,716,730.85
  5. Step 5: Solve for x
    x = 172,974,716,730.85/448,859.81
  6. Step 6: Final answer
    x = 385,364.68

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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.