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Finding the Fourth Proportional to 537,427.40, 806,918.70 and 405,235.40

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Solution

The fourth proportional to 537,427.40, 806,918.70 and 405,235.40 is: 608,439.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    537,427.40 : 806,918.70 = 405,235.40 : x
  2. Step 2: Convert to fraction form
    537,427.40/806,918.70 = 405,235.40/x
  3. Step 3: Cross multiply
    537,427.40x = 806,918.70 × 405,235.40
  4. Step 4: Simplify right side
    537,427.40x = 326,992,022,161.98
  5. Step 5: Solve for x
    x = 326,992,022,161.98/537,427.40
  6. Step 6: Final answer
    x = 608,439.43

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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.