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Finding the Fourth Proportional to 424,431.36, 637,459.20 and 266,976

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Solution

The fourth proportional to 424,431.36, 637,459.20 and 266,976 is: 400,974.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,431.36 : 637,459.20 = 266,976 : x
  2. Step 2: Convert to fraction form
    424,431.36/637,459.20 = 266,976/x
  3. Step 3: Cross multiply
    424,431.36x = 637,459.20 × 266,976
  4. Step 4: Simplify right side
    424,431.36x = 170,186,307,379.20
  5. Step 5: Solve for x
    x = 170,186,307,379.20/424,431.36
  6. Step 6: Final answer
    x = 400,974.87

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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.