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Finding the Fourth Proportional to 385,366.74, 531,806.76 and 215,601

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Solution

The fourth proportional to 385,366.74, 531,806.76 and 215,601 is: 297,529.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,366.74 : 531,806.76 = 215,601 : x
  2. Step 2: Convert to fraction form
    385,366.74/531,806.76 = 215,601/x
  3. Step 3: Cross multiply
    385,366.74x = 531,806.76 × 215,601
  4. Step 4: Simplify right side
    385,366.74x = 114,658,069,262.76
  5. Step 5: Solve for x
    x = 114,658,069,262.76/385,366.74
  6. Step 6: Final answer
    x = 297,529.75

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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.