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Finding the Fourth Proportional to 659,338.66, 989,185.56 and 339,316.18

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Solution

The fourth proportional to 659,338.66, 989,185.56 and 339,316.18 is: 509,065.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,338.66 : 989,185.56 = 339,316.18 : x
  2. Step 2: Convert to fraction form
    659,338.66/989,185.56 = 339,316.18/x
  3. Step 3: Cross multiply
    659,338.66x = 989,185.56 × 339,316.18
  4. Step 4: Simplify right side
    659,338.66x = 335,646,665,530.36
  5. Step 5: Solve for x
    x = 335,646,665,530.36/659,338.66
  6. Step 6: Final answer
    x = 509,065.65

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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.