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Finding the Fourth Proportional to 421,757.01, 632,642.81 and 155,380.41

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Solution

The fourth proportional to 421,757.01, 632,642.81 and 155,380.41 is: 233,073.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,757.01 : 632,642.81 = 155,380.41 : x
  2. Step 2: Convert to fraction form
    421,757.01/632,642.81 = 155,380.41/x
  3. Step 3: Cross multiply
    421,757.01x = 632,642.81 × 155,380.41
  4. Step 4: Simplify right side
    421,757.01x = 98,300,298,424.45
  5. Step 5: Solve for x
    x = 98,300,298,424.45/421,757.01
  6. Step 6: Final answer
    x = 233,073.30

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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.