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Finding the Fourth Proportional to 405,339.92, 608,040.93 and 139,098.32

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Solution

The fourth proportional to 405,339.92, 608,040.93 and 139,098.32 is: 208,658.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,339.92 : 608,040.93 = 139,098.32 : x
  2. Step 2: Convert to fraction form
    405,339.92/608,040.93 = 139,098.32/x
  3. Step 3: Cross multiply
    405,339.92x = 608,040.93 × 139,098.32
  4. Step 4: Simplify right side
    405,339.92x = 84,577,471,854.24
  5. Step 5: Solve for x
    x = 84,577,471,854.24/405,339.92
  6. Step 6: Final answer
    x = 208,658.14

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1.5x scale

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.