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Finding the Fourth Proportional to 756.06, 1,128.90 and 750.66

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Solution

The fourth proportional to 756.06, 1,128.90 and 750.66 is: 1,120.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.06 : 1,128.90 = 750.66 : x
  2. Step 2: Convert to fraction form
    756.06/1,128.90 = 750.66/x
  3. Step 3: Cross multiply
    756.06x = 1,128.90 × 750.66
  4. Step 4: Simplify right side
    756.06x = 847,420.07
  5. Step 5: Solve for x
    x = 847,420.07/756.06
  6. Step 6: Final answer
    x = 1,120.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.