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Finding the Fourth Proportional to 391,589.02, 540,382.35 and 230,453.56

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Solution

The fourth proportional to 391,589.02, 540,382.35 and 230,453.56 is: 318,019.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,589.02 : 540,382.35 = 230,453.56 : x
  2. Step 2: Convert to fraction form
    391,589.02/540,382.35 = 230,453.56/x
  3. Step 3: Cross multiply
    391,589.02x = 540,382.35 × 230,453.56
  4. Step 4: Simplify right side
    391,589.02x = 124,533,036,318.67
  5. Step 5: Solve for x
    x = 124,533,036,318.67/391,589.02
  6. Step 6: Final answer
    x = 318,019.73

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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.