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Finding the Fourth Proportional to 605,057.40, 907,586.10 and 405,991.80

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Solution

The fourth proportional to 605,057.40, 907,586.10 and 405,991.80 is: 608,987.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,057.40 : 907,586.10 = 405,991.80 : x
  2. Step 2: Convert to fraction form
    605,057.40/907,586.10 = 405,991.80/x
  3. Step 3: Cross multiply
    605,057.40x = 907,586.10 × 405,991.80
  4. Step 4: Simplify right side
    605,057.40x = 368,472,514,393.98
  5. Step 5: Solve for x
    x = 368,472,514,393.98/605,057.40
  6. Step 6: Final answer
    x = 608,987.70

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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.