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Finding the Fourth Proportional to 636,998.74, 879,031.71 and 346,611.43

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Solution

The fourth proportional to 636,998.74, 879,031.71 and 346,611.43 is: 478,309.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,998.74 : 879,031.71 = 346,611.43 : x
  2. Step 2: Convert to fraction form
    636,998.74/879,031.71 = 346,611.43/x
  3. Step 3: Cross multiply
    636,998.74x = 879,031.71 × 346,611.43
  4. Step 4: Simplify right side
    636,998.74x = 304,682,438,018.45
  5. Step 5: Solve for x
    x = 304,682,438,018.45/636,998.74
  6. Step 6: Final answer
    x = 478,309.33

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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.