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Finding the Fourth Proportional to 389,513.63, 584,303.89 and 136,772.39

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Solution

The fourth proportional to 389,513.63, 584,303.89 and 136,772.39 is: 205,170.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,513.63 : 584,303.89 = 136,772.39 : x
  2. Step 2: Convert to fraction form
    389,513.63/584,303.89 = 136,772.39/x
  3. Step 3: Cross multiply
    389,513.63x = 584,303.89 × 136,772.39
  4. Step 4: Simplify right side
    389,513.63x = 79,916,639,521.60
  5. Step 5: Solve for x
    x = 79,916,639,521.60/389,513.63
  6. Step 6: Final answer
    x = 205,170.33

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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.