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Finding the Fourth Proportional to 492,291.81, 679,589.51 and 288,314.37

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Solution

The fourth proportional to 492,291.81, 679,589.51 and 288,314.37 is: 398,006.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,291.81 : 679,589.51 = 288,314.37 : x
  2. Step 2: Convert to fraction form
    492,291.81/679,589.51 = 288,314.37/x
  3. Step 3: Cross multiply
    492,291.81x = 679,589.51 × 288,314.37
  4. Step 4: Simplify right side
    492,291.81x = 195,935,419,992.69
  5. Step 5: Solve for x
    x = 195,935,419,992.69/492,291.81
  6. Step 6: Final answer
    x = 398,006.66

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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.