Home / 643,819.24-888,428.82-357,339.40

Finding the Fourth Proportional to 643,819.24, 888,428.82 and 357,339.40

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Solution

The fourth proportional to 643,819.24, 888,428.82 and 357,339.40 is: 493,105.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,819.24 : 888,428.82 = 357,339.40 : x
  2. Step 2: Convert to fraction form
    643,819.24/888,428.82 = 357,339.40/x
  3. Step 3: Cross multiply
    643,819.24x = 888,428.82 × 357,339.40
  4. Step 4: Simplify right side
    643,819.24x = 317,470,621,481.51
  5. Step 5: Solve for x
    x = 317,470,621,481.51/643,819.24
  6. Step 6: Final answer
    x = 493,105.21

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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.