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Finding the Fourth Proportional to 639,007.10, 957,696.60 and 339,631.10

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Solution

The fourth proportional to 639,007.10, 957,696.60 and 339,631.10 is: 509,013.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,007.10 : 957,696.60 = 339,631.10 : x
  2. Step 2: Convert to fraction form
    639,007.10/957,696.60 = 339,631.10/x
  3. Step 3: Cross multiply
    639,007.10x = 957,696.60 × 339,631.10
  4. Step 4: Simplify right side
    639,007.10x = 325,263,549,724.26
  5. Step 5: Solve for x
    x = 325,263,549,724.26/639,007.10
  6. Step 6: Final answer
    x = 509,013.98

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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.