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Finding the Fourth Proportional to 756.74, 1,135.19 and 565.58

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Solution

The fourth proportional to 756.74, 1,135.19 and 565.58 is: 848.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.74 : 1,135.19 = 565.58 : x
  2. Step 2: Convert to fraction form
    756.74/1,135.19 = 565.58/x
  3. Step 3: Cross multiply
    756.74x = 1,135.19 × 565.58
  4. Step 4: Simplify right side
    756.74x = 642,040.76
  5. Step 5: Solve for x
    x = 642,040.76/756.74
  6. Step 6: Final answer
    x = 848.43

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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.