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Finding the Fourth Proportional to 321,898.19, 482,847.35 and 85,259.39

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Solution

The fourth proportional to 321,898.19, 482,847.35 and 85,259.39 is: 127,889.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,898.19 : 482,847.35 = 85,259.39 : x
  2. Step 2: Convert to fraction form
    321,898.19/482,847.35 = 85,259.39/x
  3. Step 3: Cross multiply
    321,898.19x = 482,847.35 × 85,259.39
  4. Step 4: Simplify right side
    321,898.19x = 41,167,267,683.58
  5. Step 5: Solve for x
    x = 41,167,267,683.58/321,898.19
  6. Step 6: Final answer
    x = 127,889.10

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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.