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Finding the Fourth Proportional to 351,430.45, 527,145.69 and 85,190.97

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Solution

The fourth proportional to 351,430.45, 527,145.69 and 85,190.97 is: 127,786.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,430.45 : 527,145.69 = 85,190.97 : x
  2. Step 2: Convert to fraction form
    351,430.45/527,145.69 = 85,190.97/x
  3. Step 3: Cross multiply
    351,430.45x = 527,145.69 × 85,190.97
  4. Step 4: Simplify right side
    351,430.45x = 44,908,054,479.48
  5. Step 5: Solve for x
    x = 44,908,054,479.48/351,430.45
  6. Step 6: Final answer
    x = 127,786.46

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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.