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Finding the Fourth Proportional to 617,639.40, 852,302.79 and 345,661.38

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Solution

The fourth proportional to 617,639.40, 852,302.79 and 345,661.38 is: 476,990.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,639.40 : 852,302.79 = 345,661.38 : x
  2. Step 2: Convert to fraction form
    617,639.40/852,302.79 = 345,661.38/x
  3. Step 3: Cross multiply
    617,639.40x = 852,302.79 × 345,661.38
  4. Step 4: Simplify right side
    617,639.40x = 294,608,158,569.25
  5. Step 5: Solve for x
    x = 294,608,158,569.25/617,639.40
  6. Step 6: Final answer
    x = 476,990.55

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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.