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Finding the Fourth Proportional to 751.90, 1,128.12 and 537.16

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Solution

The fourth proportional to 751.90, 1,128.12 and 537.16 is: 805.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.90 : 1,128.12 = 537.16 : x
  2. Step 2: Convert to fraction form
    751.90/1,128.12 = 537.16/x
  3. Step 3: Cross multiply
    751.90x = 1,128.12 × 537.16
  4. Step 4: Simplify right side
    751.90x = 605,980.94
  5. Step 5: Solve for x
    x = 605,980.94/751.90
  6. Step 6: Final answer
    x = 805.93

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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.