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Finding the Fourth Proportional to 518.34, 776.14 and 312.63

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Solution

The fourth proportional to 518.34, 776.14 and 312.63 is: 468.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.34 : 776.14 = 312.63 : x
  2. Step 2: Convert to fraction form
    518.34/776.14 = 312.63/x
  3. Step 3: Cross multiply
    518.34x = 776.14 × 312.63
  4. Step 4: Simplify right side
    518.34x = 242,639.20
  5. Step 5: Solve for x
    x = 242,639.20/518.34
  6. Step 6: Final answer
    x = 468.11

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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.