Home / 689,786.20-951,936.10-387,980.20

Finding the Fourth Proportional to 689,786.20, 951,936.10 and 387,980.20

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Solution

The fourth proportional to 689,786.20, 951,936.10 and 387,980.20 is: 535,430.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,786.20 : 951,936.10 = 387,980.20 : x
  2. Step 2: Convert to fraction form
    689,786.20/951,936.10 = 387,980.20/x
  3. Step 3: Cross multiply
    689,786.20x = 951,936.10 × 387,980.20
  4. Step 4: Simplify right side
    689,786.20x = 369,332,358,465.22
  5. Step 5: Solve for x
    x = 369,332,358,465.22/689,786.20
  6. Step 6: Final answer
    x = 535,430.19

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.