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Finding the Fourth Proportional to 587,178.25, 810,305.99 and 318,906.25

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Solution

The fourth proportional to 587,178.25, 810,305.99 and 318,906.25 is: 440,090.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,178.25 : 810,305.99 = 318,906.25 : x
  2. Step 2: Convert to fraction form
    587,178.25/810,305.99 = 318,906.25/x
  3. Step 3: Cross multiply
    587,178.25x = 810,305.99 × 318,906.25
  4. Step 4: Simplify right side
    587,178.25x = 258,411,644,623.44
  5. Step 5: Solve for x
    x = 258,411,644,623.44/587,178.25
  6. Step 6: Final answer
    x = 440,090.63

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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.