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Finding the Fourth Proportional to 617,137.09, 852,174.81 and 388,077.70

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Solution

The fourth proportional to 617,137.09, 852,174.81 and 388,077.70 is: 535,877.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,137.09 : 852,174.81 = 388,077.70 : x
  2. Step 2: Convert to fraction form
    617,137.09/852,174.81 = 388,077.70/x
  3. Step 3: Cross multiply
    617,137.09x = 852,174.81 × 388,077.70
  4. Step 4: Simplify right side
    617,137.09x = 330,710,040,262.74
  5. Step 5: Solve for x
    x = 330,710,040,262.74/617,137.09
  6. Step 6: Final answer
    x = 535,877.76

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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.