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Finding the Fourth Proportional to 425,511.40, 637,424.70 and 275,855.80

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Solution

The fourth proportional to 425,511.40, 637,424.70 and 275,855.80 is: 413,237.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,511.40 : 637,424.70 = 275,855.80 : x
  2. Step 2: Convert to fraction form
    425,511.40/637,424.70 = 275,855.80/x
  3. Step 3: Cross multiply
    425,511.40x = 637,424.70 × 275,855.80
  4. Step 4: Simplify right side
    425,511.40x = 175,837,300,558.26
  5. Step 5: Solve for x
    x = 175,837,300,558.26/425,511.40
  6. Step 6: Final answer
    x = 413,237.58

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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.