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Finding the Fourth Proportional to 2,335.90, 3,503.16 and 1,239.68

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Solution

The fourth proportional to 2,335.90, 3,503.16 and 1,239.68 is: 1,859.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,335.90 : 3,503.16 = 1,239.68 : x
  2. Step 2: Convert to fraction form
    2,335.90/3,503.16 = 1,239.68/x
  3. Step 3: Cross multiply
    2,335.90x = 3,503.16 × 1,239.68
  4. Step 4: Simplify right side
    2,335.90x = 4,342,779.87
  5. Step 5: Solve for x
    x = 4,342,779.87/2,335.90
  6. Step 6: Final answer
    x = 1,859.15

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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.