Home / 1,291.15-1,936.45-424.99

Finding the Fourth Proportional to 1,291.15, 1,936.45 and 424.99

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Solution

The fourth proportional to 1,291.15, 1,936.45 and 424.99 is: 637.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.15 : 1,936.45 = 424.99 : x
  2. Step 2: Convert to fraction form
    1,291.15/1,936.45 = 424.99/x
  3. Step 3: Cross multiply
    1,291.15x = 1,936.45 × 424.99
  4. Step 4: Simplify right side
    1,291.15x = 822,971.89
  5. Step 5: Solve for x
    x = 822,971.89/1,291.15
  6. Step 6: Final answer
    x = 637.39

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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.