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Finding the Fourth Proportional to 347,065.90, 520,728.45 and 136,850.38

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Solution

The fourth proportional to 347,065.90, 520,728.45 and 136,850.38 is: 205,326.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,065.90 : 520,728.45 = 136,850.38 : x
  2. Step 2: Convert to fraction form
    347,065.90/520,728.45 = 136,850.38/x
  3. Step 3: Cross multiply
    347,065.90x = 520,728.45 × 136,850.38
  4. Step 4: Simplify right side
    347,065.90x = 71,261,886,259.31
  5. Step 5: Solve for x
    x = 71,261,886,259.31/347,065.90
  6. Step 6: Final answer
    x = 205,326.67

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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.