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Finding the Fourth Proportional to 706.55, 1,059.21 and 417.38

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Solution

The fourth proportional to 706.55, 1,059.21 and 417.38 is: 625.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.55 : 1,059.21 = 417.38 : x
  2. Step 2: Convert to fraction form
    706.55/1,059.21 = 417.38/x
  3. Step 3: Cross multiply
    706.55x = 1,059.21 × 417.38
  4. Step 4: Simplify right side
    706.55x = 442,087.77
  5. Step 5: Solve for x
    x = 442,087.77/706.55
  6. Step 6: Final answer
    x = 625.70

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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.