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Finding the Fourth Proportional to 391,315.21, 586,944.11 and 125,004.22

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Solution

The fourth proportional to 391,315.21, 586,944.11 and 125,004.22 is: 187,497.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,315.21 : 586,944.11 = 125,004.22 : x
  2. Step 2: Convert to fraction form
    391,315.21/586,944.11 = 125,004.22/x
  3. Step 3: Cross multiply
    391,315.21x = 586,944.11 × 125,004.22
  4. Step 4: Simplify right side
    391,315.21x = 73,370,490,029.12
  5. Step 5: Solve for x
    x = 73,370,490,029.12/391,315.21
  6. Step 6: Final answer
    x = 187,497.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.