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Finding the Fourth Proportional to 706.10, 1,054.09 and 613.84

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Solution

The fourth proportional to 706.10, 1,054.09 and 613.84 is: 916.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.10 : 1,054.09 = 613.84 : x
  2. Step 2: Convert to fraction form
    706.10/1,054.09 = 613.84/x
  3. Step 3: Cross multiply
    706.10x = 1,054.09 × 613.84
  4. Step 4: Simplify right side
    706.10x = 647,042.47
  5. Step 5: Solve for x
    x = 647,042.47/706.10
  6. Step 6: Final answer
    x = 916.35

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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.