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Finding the Fourth Proportional to 659,578.73, 989,538.65 and 386,255.75

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Solution

The fourth proportional to 659,578.73, 989,538.65 and 386,255.75 is: 579,483.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,578.73 : 989,538.65 = 386,255.75 : x
  2. Step 2: Convert to fraction form
    659,578.73/989,538.65 = 386,255.75/x
  3. Step 3: Cross multiply
    659,578.73x = 989,538.65 × 386,255.75
  4. Step 4: Simplify right side
    659,578.73x = 382,214,986,530.77
  5. Step 5: Solve for x
    x = 382,214,986,530.77/659,578.73
  6. Step 6: Final answer
    x = 579,483.50

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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.