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Finding the Fourth Proportional to 405,437.85, 607,639.19 and 192,205.35

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Solution

The fourth proportional to 405,437.85, 607,639.19 and 192,205.35 is: 288,062.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,437.85 : 607,639.19 = 192,205.35 : x
  2. Step 2: Convert to fraction form
    405,437.85/607,639.19 = 192,205.35/x
  3. Step 3: Cross multiply
    405,437.85x = 607,639.19 × 192,205.35
  4. Step 4: Simplify right side
    405,437.85x = 116,791,502,226.64
  5. Step 5: Solve for x
    x = 116,791,502,226.64/405,437.85
  6. Step 6: Final answer
    x = 288,062.65

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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.