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Finding the Fourth Proportional to 620,803.78, 931,196.28 and 171,514.60

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Solution

The fourth proportional to 620,803.78, 931,196.28 and 171,514.60 is: 257,269.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,803.78 : 931,196.28 = 171,514.60 : x
  2. Step 2: Convert to fraction form
    620,803.78/931,196.28 = 171,514.60/x
  3. Step 3: Cross multiply
    620,803.78x = 931,196.28 × 171,514.60
  4. Step 4: Simplify right side
    620,803.78x = 159,713,757,485.69
  5. Step 5: Solve for x
    x = 159,713,757,485.69/620,803.78
  6. Step 6: Final answer
    x = 257,269.31

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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.