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Finding the Fourth Proportional to 659,394.89, 989,081.48 and 210,109.68

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Solution

The fourth proportional to 659,394.89, 989,081.48 and 210,109.68 is: 315,161.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,394.89 : 989,081.48 = 210,109.68 : x
  2. Step 2: Convert to fraction form
    659,394.89/989,081.48 = 210,109.68/x
  3. Step 3: Cross multiply
    659,394.89x = 989,081.48 × 210,109.68
  4. Step 4: Simplify right side
    659,394.89x = 207,815,592,206.18
  5. Step 5: Solve for x
    x = 207,815,592,206.18/659,394.89
  6. Step 6: Final answer
    x = 315,161.06

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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.