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Finding the Fourth Proportional to 469,921.69, 648,491.99 and 255,061.70

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Solution

The fourth proportional to 469,921.69, 648,491.99 and 255,061.70 is: 351,985.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    469,921.69 : 648,491.99 = 255,061.70 : x
  2. Step 2: Convert to fraction form
    469,921.69/648,491.99 = 255,061.70/x
  3. Step 3: Cross multiply
    469,921.69x = 648,491.99 × 255,061.70
  4. Step 4: Simplify right side
    469,921.69x = 165,405,469,405.78
  5. Step 5: Solve for x
    x = 165,405,469,405.78/469,921.69
  6. Step 6: Final answer
    x = 351,985.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.