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Finding the Fourth Proportional to 389,685.69, 584,532.81 and 136,973.39

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Solution

The fourth proportional to 389,685.69, 584,532.81 and 136,973.39 is: 205,461.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,685.69 : 584,532.81 = 136,973.39 : x
  2. Step 2: Convert to fraction form
    389,685.69/584,532.81 = 136,973.39/x
  3. Step 3: Cross multiply
    389,685.69x = 584,532.81 × 136,973.39
  4. Step 4: Simplify right side
    389,685.69x = 80,065,437,629.26
  5. Step 5: Solve for x
    x = 80,065,437,629.26/389,685.69
  6. Step 6: Final answer
    x = 205,461.58

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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.