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Finding the Fourth Proportional to 614.62, 847.21 and 417.79

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Solution

The fourth proportional to 614.62, 847.21 and 417.79 is: 575.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.62 : 847.21 = 417.79 : x
  2. Step 2: Convert to fraction form
    614.62/847.21 = 417.79/x
  3. Step 3: Cross multiply
    614.62x = 847.21 × 417.79
  4. Step 4: Simplify right side
    614.62x = 353,955.87
  5. Step 5: Solve for x
    x = 353,955.87/614.62
  6. Step 6: Final answer
    x = 575.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.