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Finding the Fourth Proportional to 351,980.65, 528,069.40 and 115,489.40

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Solution

The fourth proportional to 351,980.65, 528,069.40 and 115,489.40 is: 173,266.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,980.65 : 528,069.40 = 115,489.40 : x
  2. Step 2: Convert to fraction form
    351,980.65/528,069.40 = 115,489.40/x
  3. Step 3: Cross multiply
    351,980.65x = 528,069.40 × 115,489.40
  4. Step 4: Simplify right side
    351,980.65x = 60,986,418,164.36
  5. Step 5: Solve for x
    x = 60,986,418,164.36/351,980.65
  6. Step 6: Final answer
    x = 173,266.39

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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.