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Finding the Fourth Proportional to 347,719.40, 520,412.70 and 347,719.40

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Solution

The fourth proportional to 347,719.40, 520,412.70 and 347,719.40 is: 520,412.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,719.40 : 520,412.70 = 347,719.40 : x
  2. Step 2: Convert to fraction form
    347,719.40/520,412.70 = 347,719.40/x
  3. Step 3: Cross multiply
    347,719.40x = 520,412.70 × 347,719.40
  4. Step 4: Simplify right side
    347,719.40x = 180,957,591,796.38
  5. Step 5: Solve for x
    x = 180,957,591,796.38/347,719.40
  6. Step 6: Final answer
    x = 520,412.70

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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.