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Finding the Fourth Proportional to 610.68, 841.82 and 389.55

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Solution

The fourth proportional to 610.68, 841.82 and 389.55 is: 536.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.68 : 841.82 = 389.55 : x
  2. Step 2: Convert to fraction form
    610.68/841.82 = 389.55/x
  3. Step 3: Cross multiply
    610.68x = 841.82 × 389.55
  4. Step 4: Simplify right side
    610.68x = 327,929.03
  5. Step 5: Solve for x
    x = 327,929.03/610.68
  6. Step 6: Final answer
    x = 536.99

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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.