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Finding the Fourth Proportional to 520,937.70, 718,665.90 and 305,980.86

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Solution

The fourth proportional to 520,937.70, 718,665.90 and 305,980.86 is: 422,119.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,937.70 : 718,665.90 = 305,980.86 : x
  2. Step 2: Convert to fraction form
    520,937.70/718,665.90 = 305,980.86/x
  3. Step 3: Cross multiply
    520,937.70x = 718,665.90 × 305,980.86
  4. Step 4: Simplify right side
    520,937.70x = 219,898,010,134.67
  5. Step 5: Solve for x
    x = 219,898,010,134.67/520,937.70
  6. Step 6: Final answer
    x = 422,119.59

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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.