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Finding the Fourth Proportional to 617,661.29, 852,251.38 and 388,085.57

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Solution

The fourth proportional to 617,661.29, 852,251.38 and 388,085.57 is: 535,481.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,661.29 : 852,251.38 = 388,085.57 : x
  2. Step 2: Convert to fraction form
    617,661.29/852,251.38 = 388,085.57/x
  3. Step 3: Cross multiply
    617,661.29x = 852,251.38 × 388,085.57
  4. Step 4: Simplify right side
    617,661.29x = 330,746,462,590.59
  5. Step 5: Solve for x
    x = 330,746,462,590.59/617,661.29
  6. Step 6: Final answer
    x = 535,481.93

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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.