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Finding the Fourth Proportional to 659,661.20, 989,491.80 and 238,950.80

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Solution

The fourth proportional to 659,661.20, 989,491.80 and 238,950.80 is: 358,426.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,661.20 : 989,491.80 = 238,950.80 : x
  2. Step 2: Convert to fraction form
    659,661.20/989,491.80 = 238,950.80/x
  3. Step 3: Cross multiply
    659,661.20x = 989,491.80 × 238,950.80
  4. Step 4: Simplify right side
    659,661.20x = 236,439,857,203.44
  5. Step 5: Solve for x
    x = 236,439,857,203.44/659,661.20
  6. Step 6: Final answer
    x = 358,426.20

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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.