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Finding the Fourth Proportional to 621,877.76, 931,321.80 and 354,828.68

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Solution

The fourth proportional to 621,877.76, 931,321.80 and 354,828.68 is: 531,390.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,877.76 : 931,321.80 = 354,828.68 : x
  2. Step 2: Convert to fraction form
    621,877.76/931,321.80 = 354,828.68/x
  3. Step 3: Cross multiply
    621,877.76x = 931,321.80 × 354,828.68
  4. Step 4: Simplify right side
    621,877.76x = 330,459,680,292.62
  5. Step 5: Solve for x
    x = 330,459,680,292.62/621,877.76
  6. Step 6: Final answer
    x = 531,390.10

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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.