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Finding the Fourth Proportional to 758.46, 1,137.19 and 612.39

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Solution

The fourth proportional to 758.46, 1,137.19 and 612.39 is: 918.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.46 : 1,137.19 = 612.39 : x
  2. Step 2: Convert to fraction form
    758.46/1,137.19 = 612.39/x
  3. Step 3: Cross multiply
    758.46x = 1,137.19 × 612.39
  4. Step 4: Simplify right side
    758.46x = 696,403.78
  5. Step 5: Solve for x
    x = 696,403.78/758.46
  6. Step 6: Final answer
    x = 918.18

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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.