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Finding the Fourth Proportional to 659,348.09, 989,428.22 and 259,920.89

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Solution

The fourth proportional to 659,348.09, 989,428.22 and 259,920.89 is: 390,041.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,348.09 : 989,428.22 = 259,920.89 : x
  2. Step 2: Convert to fraction form
    659,348.09/989,428.22 = 259,920.89/x
  3. Step 3: Cross multiply
    659,348.09x = 989,428.22 × 259,920.89
  4. Step 4: Simplify right side
    659,348.09x = 257,173,062,233.91
  5. Step 5: Solve for x
    x = 257,173,062,233.91/659,348.09
  6. Step 6: Final answer
    x = 390,041.42

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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.