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Finding the Fourth Proportional to 405,339.42, 608,040.18 and 139,097.82

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Solution

The fourth proportional to 405,339.42, 608,040.18 and 139,097.82 is: 208,657.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,339.42 : 608,040.18 = 139,097.82 : x
  2. Step 2: Convert to fraction form
    405,339.42/608,040.18 = 139,097.82/x
  3. Step 3: Cross multiply
    405,339.42x = 608,040.18 × 139,097.82
  4. Step 4: Simplify right side
    405,339.42x = 84,577,063,510.41
  5. Step 5: Solve for x
    x = 84,577,063,510.41/405,339.42
  6. Step 6: Final answer
    x = 208,657.39

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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.