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Finding the Fourth Proportional to 427,809, 642,344.26 and 238,638.92

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Solution

The fourth proportional to 427,809, 642,344.26 and 238,638.92 is: 358,310.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,809 : 642,344.26 = 238,638.92 : x
  2. Step 2: Convert to fraction form
    427,809/642,344.26 = 238,638.92/x
  3. Step 3: Cross multiply
    427,809x = 642,344.26 × 238,638.92
  4. Step 4: Simplify right side
    427,809x = 153,288,340,474.60
  5. Step 5: Solve for x
    x = 153,288,340,474.60/427,809
  6. Step 6: Final answer
    x = 358,310.23

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1.5x scale

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.