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Finding the Fourth Proportional to 391,748.42, 540,613.05 and 212,900.42

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Solution

The fourth proportional to 391,748.42, 540,613.05 and 212,900.42 is: 293,802.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,748.42 : 540,613.05 = 212,900.42 : x
  2. Step 2: Convert to fraction form
    391,748.42/540,613.05 = 212,900.42/x
  3. Step 3: Cross multiply
    391,748.42x = 540,613.05 × 212,900.42
  4. Step 4: Simplify right side
    391,748.42x = 115,096,745,402.48
  5. Step 5: Solve for x
    x = 115,096,745,402.48/391,748.42
  6. Step 6: Final answer
    x = 293,802.70

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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.