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Finding the Fourth Proportional to 445,419, 668,239.93 and 129,875.91

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Solution

The fourth proportional to 445,419, 668,239.93 and 129,875.91 is: 194,846.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,419 : 668,239.93 = 129,875.91 : x
  2. Step 2: Convert to fraction form
    445,419/668,239.93 = 129,875.91/x
  3. Step 3: Cross multiply
    445,419x = 668,239.93 × 129,875.91
  4. Step 4: Simplify right side
    445,419x = 86,788,265,932.98
  5. Step 5: Solve for x
    x = 86,788,265,932.98/445,419
  6. Step 6: Final answer
    x = 194,846.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.