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Finding the Fourth Proportional to 391,083.81, 539,695.66 and 212,235.81

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Solution

The fourth proportional to 391,083.81, 539,695.66 and 212,235.81 is: 292,885.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,083.81 : 539,695.66 = 212,235.81 : x
  2. Step 2: Convert to fraction form
    391,083.81/539,695.66 = 212,235.81/x
  3. Step 3: Cross multiply
    391,083.81x = 539,695.66 × 212,235.81
  4. Step 4: Simplify right side
    391,083.81x = 114,542,747,433.41
  5. Step 5: Solve for x
    x = 114,542,747,433.41/391,083.81
  6. Step 6: Final answer
    x = 292,885.42

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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.