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Finding the Fourth Proportional to 655,991.48, 905,148 and 369,450.20

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Solution

The fourth proportional to 655,991.48, 905,148 and 369,450.20 is: 509,773.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,991.48 : 905,148 = 369,450.20 : x
  2. Step 2: Convert to fraction form
    655,991.48/905,148 = 369,450.20/x
  3. Step 3: Cross multiply
    655,991.48x = 905,148 × 369,450.20
  4. Step 4: Simplify right side
    655,991.48x = 334,407,109,629.60
  5. Step 5: Solve for x
    x = 334,407,109,629.60/655,991.48
  6. Step 6: Final answer
    x = 509,773.56

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1.5x scale

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.