Home / 642,122.10-886,143.24-351,761.40

Finding the Fourth Proportional to 642,122.10, 886,143.24 and 351,761.40

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Solution

The fourth proportional to 642,122.10, 886,143.24 and 351,761.40 is: 485,438.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,122.10 : 886,143.24 = 351,761.40 : x
  2. Step 2: Convert to fraction form
    642,122.10/886,143.24 = 351,761.40/x
  3. Step 3: Cross multiply
    642,122.10x = 886,143.24 × 351,761.40
  4. Step 4: Simplify right side
    642,122.10x = 311,710,986,702.94
  5. Step 5: Solve for x
    x = 311,710,986,702.94/642,122.10
  6. Step 6: Final answer
    x = 485,438.81

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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.