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Finding the Fourth Proportional to 621,078.56, 931,565.84 and 171,804.96

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Solution

The fourth proportional to 621,078.56, 931,565.84 and 171,804.96 is: 257,693.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,078.56 : 931,565.84 = 171,804.96 : x
  2. Step 2: Convert to fraction form
    621,078.56/931,565.84 = 171,804.96/x
  3. Step 3: Cross multiply
    621,078.56x = 931,565.84 × 171,804.96
  4. Step 4: Simplify right side
    621,078.56x = 160,047,631,878.57
  5. Step 5: Solve for x
    x = 160,047,631,878.57/621,078.56
  6. Step 6: Final answer
    x = 257,693.06

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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.