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Finding the Fourth Proportional to 559,781.98, 772,469.99 and 318,031

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Solution

The fourth proportional to 559,781.98, 772,469.99 and 318,031 is: 438,866.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,781.98 : 772,469.99 = 318,031 : x
  2. Step 2: Convert to fraction form
    559,781.98/772,469.99 = 318,031/x
  3. Step 3: Cross multiply
    559,781.98x = 772,469.99 × 318,031
  4. Step 4: Simplify right side
    559,781.98x = 245,669,401,799.54
  5. Step 5: Solve for x
    x = 245,669,401,799.54/559,781.98
  6. Step 6: Final answer
    x = 438,866.22

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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.