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Finding the Fourth Proportional to 515.98, 772.35 and 407.44

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Solution

The fourth proportional to 515.98, 772.35 and 407.44 is: 609.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.98 : 772.35 = 407.44 : x
  2. Step 2: Convert to fraction form
    515.98/772.35 = 407.44/x
  3. Step 3: Cross multiply
    515.98x = 772.35 × 407.44
  4. Step 4: Simplify right side
    515.98x = 314,686.28
  5. Step 5: Solve for x
    x = 314,686.28/515.98
  6. Step 6: Final answer
    x = 609.88

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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.