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Finding the Fourth Proportional to 751.88, 1,127.87 and 477.60

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Solution

The fourth proportional to 751.88, 1,127.87 and 477.60 is: 716.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.88 : 1,127.87 = 477.60 : x
  2. Step 2: Convert to fraction form
    751.88/1,127.87 = 477.60/x
  3. Step 3: Cross multiply
    751.88x = 1,127.87 × 477.60
  4. Step 4: Simplify right side
    751.88x = 538,670.71
  5. Step 5: Solve for x
    x = 538,670.71/751.88
  6. Step 6: Final answer
    x = 716.43

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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.