Home / 385,288.48-531,669.12-215,489.80

Finding the Fourth Proportional to 385,288.48, 531,669.12 and 215,489.80

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Solution

The fourth proportional to 385,288.48, 531,669.12 and 215,489.80 is: 297,359.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,288.48 : 531,669.12 = 215,489.80 : x
  2. Step 2: Convert to fraction form
    385,288.48/531,669.12 = 215,489.80/x
  3. Step 3: Cross multiply
    385,288.48x = 531,669.12 × 215,489.80
  4. Step 4: Simplify right side
    385,288.48x = 114,569,272,334.98
  5. Step 5: Solve for x
    x = 114,569,272,334.98/385,288.48
  6. Step 6: Final answer
    x = 297,359.71

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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.