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Finding the Fourth Proportional to 425,213.40, 637,820.10 and 247,920.60

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Solution

The fourth proportional to 425,213.40, 637,820.10 and 247,920.60 is: 371,880.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,213.40 : 637,820.10 = 247,920.60 : x
  2. Step 2: Convert to fraction form
    425,213.40/637,820.10 = 247,920.60/x
  3. Step 3: Cross multiply
    425,213.40x = 637,820.10 × 247,920.60
  4. Step 4: Simplify right side
    425,213.40x = 158,128,741,884.06
  5. Step 5: Solve for x
    x = 158,128,741,884.06/425,213.40
  6. Step 6: Final answer
    x = 371,880.90

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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.