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Finding the Fourth Proportional to 391,659.17, 540,485.06 and 219,576.29

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Solution

The fourth proportional to 391,659.17, 540,485.06 and 219,576.29 is: 303,012.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,659.17 : 540,485.06 = 219,576.29 : x
  2. Step 2: Convert to fraction form
    391,659.17/540,485.06 = 219,576.29/x
  3. Step 3: Cross multiply
    391,659.17x = 540,485.06 × 219,576.29
  4. Step 4: Simplify right side
    391,659.17x = 118,677,700,474.92
  5. Step 5: Solve for x
    x = 118,677,700,474.92/391,659.17
  6. Step 6: Final answer
    x = 303,012.70

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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.