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Finding the Fourth Proportional to 641,969.28, 886,203.72 and 424,309.05

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Solution

The fourth proportional to 641,969.28, 886,203.72 and 424,309.05 is: 585,735.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,969.28 : 886,203.72 = 424,309.05 : x
  2. Step 2: Convert to fraction form
    641,969.28/886,203.72 = 424,309.05/x
  3. Step 3: Cross multiply
    641,969.28x = 886,203.72 × 424,309.05
  4. Step 4: Simplify right side
    641,969.28x = 376,024,258,539.67
  5. Step 5: Solve for x
    x = 376,024,258,539.67/641,969.28
  6. Step 6: Final answer
    x = 585,735.60

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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.