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Finding the Fourth Proportional to 618,708.74, 853,630.02 and 389,494.83

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Solution

The fourth proportional to 618,708.74, 853,630.02 and 389,494.83 is: 537,384.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,708.74 : 853,630.02 = 389,494.83 : x
  2. Step 2: Convert to fraction form
    618,708.74/853,630.02 = 389,494.83/x
  3. Step 3: Cross multiply
    618,708.74x = 853,630.02 × 389,494.83
  4. Step 4: Simplify right side
    618,708.74x = 332,484,479,522.80
  5. Step 5: Solve for x
    x = 332,484,479,522.80/618,708.74
  6. Step 6: Final answer
    x = 537,384.49

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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.