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Finding the Fourth Proportional to 674,922.72, 931,627.91 and 388,556.94

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Solution

The fourth proportional to 674,922.72, 931,627.91 and 388,556.94 is: 536,343.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,922.72 : 931,627.91 = 388,556.94 : x
  2. Step 2: Convert to fraction form
    674,922.72/931,627.91 = 388,556.94/x
  3. Step 3: Cross multiply
    674,922.72x = 931,627.91 × 388,556.94
  4. Step 4: Simplify right side
    674,922.72x = 361,990,487,985.41
  5. Step 5: Solve for x
    x = 361,990,487,985.41/674,922.72
  6. Step 6: Final answer
    x = 536,343.61

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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.