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Finding the Fourth Proportional to 756.30, 1,137.15 and 740.10

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Solution

The fourth proportional to 756.30, 1,137.15 and 740.10 is: 1,112.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.30 : 1,137.15 = 740.10 : x
  2. Step 2: Convert to fraction form
    756.30/1,137.15 = 740.10/x
  3. Step 3: Cross multiply
    756.30x = 1,137.15 × 740.10
  4. Step 4: Simplify right side
    756.30x = 841,604.72
  5. Step 5: Solve for x
    x = 841,604.72/756.30
  6. Step 6: Final answer
    x = 1,112.79

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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.