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Finding the Fourth Proportional to 553,249.35, 763,556.86 and 311,579.17

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Solution

The fourth proportional to 553,249.35, 763,556.86 and 311,579.17 is: 430,020.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,249.35 : 763,556.86 = 311,579.17 : x
  2. Step 2: Convert to fraction form
    553,249.35/763,556.86 = 311,579.17/x
  3. Step 3: Cross multiply
    553,249.35x = 763,556.86 × 311,579.17
  4. Step 4: Simplify right side
    553,249.35x = 237,908,412,686.61
  5. Step 5: Solve for x
    x = 237,908,412,686.61/553,249.35
  6. Step 6: Final answer
    x = 430,020.23

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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.