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Finding the Fourth Proportional to 389,653.07, 584,483.85 and 136,940.76

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Solution

The fourth proportional to 389,653.07, 584,483.85 and 136,940.76 is: 205,412.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,653.07 : 584,483.85 = 136,940.76 : x
  2. Step 2: Convert to fraction form
    389,653.07/584,483.85 = 136,940.76/x
  3. Step 3: Cross multiply
    389,653.07x = 584,483.85 × 136,940.76
  4. Step 4: Simplify right side
    389,653.07x = 80,039,662,626.73
  5. Step 5: Solve for x
    x = 80,039,662,626.73/389,653.07
  6. Step 6: Final answer
    x = 205,412.63

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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.