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Finding the Fourth Proportional to 323,018.34, 484,490.52 and 86,379.45

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Solution

The fourth proportional to 323,018.34, 484,490.52 and 86,379.45 is: 129,559.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,018.34 : 484,490.52 = 86,379.45 : x
  2. Step 2: Convert to fraction form
    323,018.34/484,490.52 = 86,379.45/x
  3. Step 3: Cross multiply
    323,018.34x = 484,490.52 × 86,379.45
  4. Step 4: Simplify right side
    323,018.34x = 41,850,024,647.81
  5. Step 5: Solve for x
    x = 41,850,024,647.81/323,018.34
  6. Step 6: Final answer
    x = 129,559.28

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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.