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Finding the Fourth Proportional to 426,294.82, 639,303.79 and 141,908.98

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Solution

The fourth proportional to 426,294.82, 639,303.79 and 141,908.98 is: 212,817.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,294.82 : 639,303.79 = 141,908.98 : x
  2. Step 2: Convert to fraction form
    426,294.82/639,303.79 = 141,908.98/x
  3. Step 3: Cross multiply
    426,294.82x = 639,303.79 × 141,908.98
  4. Step 4: Simplify right side
    426,294.82x = 90,722,948,749.03
  5. Step 5: Solve for x
    x = 90,722,948,749.03/426,294.82
  6. Step 6: Final answer
    x = 212,817.38

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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.