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Finding the Fourth Proportional to 621,881.51, 931,327.43 and 354,832.43

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Solution

The fourth proportional to 621,881.51, 931,327.43 and 354,832.43 is: 531,395.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,881.51 : 931,327.43 = 354,832.43 : x
  2. Step 2: Convert to fraction form
    621,881.51/931,327.43 = 354,832.43/x
  3. Step 3: Cross multiply
    621,881.51x = 931,327.43 × 354,832.43
  4. Step 4: Simplify right side
    621,881.51x = 330,465,168,681.76
  5. Step 5: Solve for x
    x = 330,465,168,681.76/621,881.51
  6. Step 6: Final answer
    x = 531,395.72

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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.