Home / 659,138.06-909,617.68-387,217.42

Finding the Fourth Proportional to 659,138.06, 909,617.68 and 387,217.42

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Solution

The fourth proportional to 659,138.06, 909,617.68 and 387,217.42 is: 534,364.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,138.06 : 909,617.68 = 387,217.42 : x
  2. Step 2: Convert to fraction form
    659,138.06/909,617.68 = 387,217.42/x
  3. Step 3: Cross multiply
    659,138.06x = 909,617.68 × 387,217.42
  4. Step 4: Simplify right side
    659,138.06x = 352,219,811,235.99
  5. Step 5: Solve for x
    x = 352,219,811,235.99/659,138.06
  6. Step 6: Final answer
    x = 534,364.24

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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.