Home / 420,928.26-631,391.84-105,385.13

Finding the Fourth Proportional to 420,928.26, 631,391.84 and 105,385.13

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Solution

The fourth proportional to 420,928.26, 631,391.84 and 105,385.13 is: 158,077.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,928.26 : 631,391.84 = 105,385.13 : x
  2. Step 2: Convert to fraction form
    420,928.26/631,391.84 = 105,385.13/x
  3. Step 3: Cross multiply
    420,928.26x = 631,391.84 × 105,385.13
  4. Step 4: Simplify right side
    420,928.26x = 66,539,311,139.34
  5. Step 5: Solve for x
    x = 66,539,311,139.34/420,928.26
  6. Step 6: Final answer
    x = 158,077.56

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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.