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Finding the Fourth Proportional to 391,817.25, 540,670.03 and 219,742.27

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Solution

The fourth proportional to 391,817.25, 540,670.03 and 219,742.27 is: 303,223.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,817.25 : 540,670.03 = 219,742.27 : x
  2. Step 2: Convert to fraction form
    391,817.25/540,670.03 = 219,742.27/x
  3. Step 3: Cross multiply
    391,817.25x = 540,670.03 × 219,742.27
  4. Step 4: Simplify right side
    391,817.25x = 118,808,057,009.82
  5. Step 5: Solve for x
    x = 118,808,057,009.82/391,817.25
  6. Step 6: Final answer
    x = 303,223.14

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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.