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Finding the Fourth Proportional to 515.48, 774.13 and 424.83

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Solution

The fourth proportional to 515.48, 774.13 and 424.83 is: 637.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.48 : 774.13 = 424.83 : x
  2. Step 2: Convert to fraction form
    515.48/774.13 = 424.83/x
  3. Step 3: Cross multiply
    515.48x = 774.13 × 424.83
  4. Step 4: Simplify right side
    515.48x = 328,873.65
  5. Step 5: Solve for x
    x = 328,873.65/515.48
  6. Step 6: Final answer
    x = 637.99

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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.