Home / 317,455.11-438,107.73-209,838.51

Finding the Fourth Proportional to 317,455.11, 438,107.73 and 209,838.51

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Solution

The fourth proportional to 317,455.11, 438,107.73 and 209,838.51 is: 289,590.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,455.11 : 438,107.73 = 209,838.51 : x
  2. Step 2: Convert to fraction form
    317,455.11/438,107.73 = 209,838.51/x
  3. Step 3: Cross multiply
    317,455.11x = 438,107.73 × 209,838.51
  4. Step 4: Simplify right side
    317,455.11x = 91,931,873,282.68
  5. Step 5: Solve for x
    x = 91,931,873,282.68/317,455.11
  6. Step 6: Final answer
    x = 289,590.15

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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.