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Finding the Fourth Proportional to 318,792.92, 439,802.19 and 189,705.54

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Solution

The fourth proportional to 318,792.92, 439,802.19 and 189,705.54 is: 261,715.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,792.92 : 439,802.19 = 189,705.54 : x
  2. Step 2: Convert to fraction form
    318,792.92/439,802.19 = 189,705.54/x
  3. Step 3: Cross multiply
    318,792.92x = 439,802.19 × 189,705.54
  4. Step 4: Simplify right side
    318,792.92x = 83,432,911,947.13
  5. Step 5: Solve for x
    x = 83,432,911,947.13/318,792.92
  6. Step 6: Final answer
    x = 261,715.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.