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Finding the Fourth Proportional to 317,418.76, 476,017.42 and 139,828.89

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Solution

The fourth proportional to 317,418.76, 476,017.42 and 139,828.89 is: 209,694.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,418.76 : 476,017.42 = 139,828.89 : x
  2. Step 2: Convert to fraction form
    317,418.76/476,017.42 = 139,828.89/x
  3. Step 3: Cross multiply
    317,418.76x = 476,017.42 × 139,828.89
  4. Step 4: Simplify right side
    317,418.76x = 66,560,987,459.26
  5. Step 5: Solve for x
    x = 66,560,987,459.26/317,418.76
  6. Step 6: Final answer
    x = 209,694.56

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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.