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Finding the Fourth Proportional to 460.50, 636 and 312.87

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Solution

The fourth proportional to 460.50, 636 and 312.87 is: 432.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.50 : 636 = 312.87 : x
  2. Step 2: Convert to fraction form
    460.50/636 = 312.87/x
  3. Step 3: Cross multiply
    460.50x = 636 × 312.87
  4. Step 4: Simplify right side
    460.50x = 198,985.32
  5. Step 5: Solve for x
    x = 198,985.32/460.50
  6. Step 6: Final answer
    x = 432.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.