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Finding the Fourth Proportional to 317,355.42, 437,835.56 and 208,518.39

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Solution

The fourth proportional to 317,355.42, 437,835.56 and 208,518.39 is: 287,679.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,355.42 : 437,835.56 = 208,518.39 : x
  2. Step 2: Convert to fraction form
    317,355.42/437,835.56 = 208,518.39/x
  3. Step 3: Cross multiply
    317,355.42x = 437,835.56 × 208,518.39
  4. Step 4: Simplify right side
    317,355.42x = 91,296,765,013.36
  5. Step 5: Solve for x
    x = 91,296,765,013.36/317,355.42
  6. Step 6: Final answer
    x = 287,679.86

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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.