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Finding the Fourth Proportional to 751.17, 1,126.28 and 312.64

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Solution

The fourth proportional to 751.17, 1,126.28 and 312.64 is: 468.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.17 : 1,126.28 = 312.64 : x
  2. Step 2: Convert to fraction form
    751.17/1,126.28 = 312.64/x
  3. Step 3: Cross multiply
    751.17x = 1,126.28 × 312.64
  4. Step 4: Simplify right side
    751.17x = 352,118.15
  5. Step 5: Solve for x
    x = 352,118.15/751.17
  6. Step 6: Final answer
    x = 468.76

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.