Home / 385,218.18-531,572.22-215,419.50

Finding the Fourth Proportional to 385,218.18, 531,572.22 and 215,419.50

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Solution

The fourth proportional to 385,218.18, 531,572.22 and 215,419.50 is: 297,262.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,218.18 : 531,572.22 = 215,419.50 : x
  2. Step 2: Convert to fraction form
    385,218.18/531,572.22 = 215,419.50/x
  3. Step 3: Cross multiply
    385,218.18x = 531,572.22 × 215,419.50
  4. Step 4: Simplify right side
    385,218.18x = 114,511,021,846.29
  5. Step 5: Solve for x
    x = 114,511,021,846.29/385,218.18
  6. Step 6: Final answer
    x = 297,262.77

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1.5x scale

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.