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Finding the Fourth Proportional to 420,635.40, 580,543.48 and 267,513.94

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Solution

The fourth proportional to 420,635.40, 580,543.48 and 267,513.94 is: 369,211.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,635.40 : 580,543.48 = 267,513.94 : x
  2. Step 2: Convert to fraction form
    420,635.40/580,543.48 = 267,513.94/x
  3. Step 3: Cross multiply
    420,635.40x = 580,543.48 × 267,513.94
  4. Step 4: Simplify right side
    420,635.40x = 155,303,473,676.11
  5. Step 5: Solve for x
    x = 155,303,473,676.11/420,635.40
  6. Step 6: Final answer
    x = 369,211.61

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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.