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Finding the Fourth Proportional to 751.12, 1,035.88 and 555.12

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Solution

The fourth proportional to 751.12, 1,035.88 and 555.12 is: 765.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.12 : 1,035.88 = 555.12 : x
  2. Step 2: Convert to fraction form
    751.12/1,035.88 = 555.12/x
  3. Step 3: Cross multiply
    751.12x = 1,035.88 × 555.12
  4. Step 4: Simplify right side
    751.12x = 575,037.71
  5. Step 5: Solve for x
    x = 575,037.71/751.12
  6. Step 6: Final answer
    x = 765.57

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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.