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Finding the Fourth Proportional to 485,491, 669,703.18 and 303,887.68

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Solution

The fourth proportional to 485,491, 669,703.18 and 303,887.68 is: 419,193.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,491 : 669,703.18 = 303,887.68 : x
  2. Step 2: Convert to fraction form
    485,491/669,703.18 = 303,887.68/x
  3. Step 3: Cross multiply
    485,491x = 669,703.18 × 303,887.68
  4. Step 4: Simplify right side
    485,491x = 203,514,545,658.82
  5. Step 5: Solve for x
    x = 203,514,545,658.82/485,491
  6. Step 6: Final answer
    x = 419,193.24

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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.