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Finding the Fourth Proportional to 751.56, 1,035.63 and 518.28

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Solution

The fourth proportional to 751.56, 1,035.63 and 518.28 is: 714.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.56 : 1,035.63 = 518.28 : x
  2. Step 2: Convert to fraction form
    751.56/1,035.63 = 518.28/x
  3. Step 3: Cross multiply
    751.56x = 1,035.63 × 518.28
  4. Step 4: Simplify right side
    751.56x = 536,746.32
  5. Step 5: Solve for x
    x = 536,746.32/751.56
  6. Step 6: Final answer
    x = 714.18

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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.