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Finding the Fourth Proportional to 481,402.08, 664,308.54 and 287,813.70

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Solution

The fourth proportional to 481,402.08, 664,308.54 and 287,813.70 is: 397,167.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,402.08 : 664,308.54 = 287,813.70 : x
  2. Step 2: Convert to fraction form
    481,402.08/664,308.54 = 287,813.70/x
  3. Step 3: Cross multiply
    481,402.08x = 664,308.54 × 287,813.70
  4. Step 4: Simplify right side
    481,402.08x = 191,197,098,839.00
  5. Step 5: Solve for x
    x = 191,197,098,839.00/481,402.08
  6. Step 6: Final answer
    x = 397,167.16

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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.