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Finding the Fourth Proportional to 479,373.68, 661,800.84 and 288,434

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Solution

The fourth proportional to 479,373.68, 661,800.84 and 288,434 is: 398,198.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,373.68 : 661,800.84 = 288,434 : x
  2. Step 2: Convert to fraction form
    479,373.68/661,800.84 = 288,434/x
  3. Step 3: Cross multiply
    479,373.68x = 661,800.84 × 288,434
  4. Step 4: Simplify right side
    479,373.68x = 190,885,863,484.56
  5. Step 5: Solve for x
    x = 190,885,863,484.56/479,373.68
  6. Step 6: Final answer
    x = 398,198.46

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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.