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Finding the Fourth Proportional to 685,497.72, 946,093.64 and 391,148.03

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Solution

The fourth proportional to 685,497.72, 946,093.64 and 391,148.03 is: 539,845.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,497.72 : 946,093.64 = 391,148.03 : x
  2. Step 2: Convert to fraction form
    685,497.72/946,093.64 = 391,148.03/x
  3. Step 3: Cross multiply
    685,497.72x = 946,093.64 × 391,148.03
  4. Step 4: Simplify right side
    685,497.72x = 370,062,658,063.89
  5. Step 5: Solve for x
    x = 370,062,658,063.89/685,497.72
  6. Step 6: Final answer
    x = 539,845.20

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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.