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Finding the Fourth Proportional to 352,619.43, 528,925.50 and 86,381.34

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Solution

The fourth proportional to 352,619.43, 528,925.50 and 86,381.34 is: 129,571.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,619.43 : 528,925.50 = 86,381.34 : x
  2. Step 2: Convert to fraction form
    352,619.43/528,925.50 = 86,381.34/x
  3. Step 3: Cross multiply
    352,619.43x = 528,925.50 × 86,381.34
  4. Step 4: Simplify right side
    352,619.43x = 45,689,293,450.17
  5. Step 5: Solve for x
    x = 45,689,293,450.17/352,619.43
  6. Step 6: Final answer
    x = 129,571.12

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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.