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Finding the Fourth Proportional to 609.65, 841.38 and 347.72

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Solution

The fourth proportional to 609.65, 841.38 and 347.72 is: 479.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.65 : 841.38 = 347.72 : x
  2. Step 2: Convert to fraction form
    609.65/841.38 = 347.72/x
  3. Step 3: Cross multiply
    609.65x = 841.38 × 347.72
  4. Step 4: Simplify right side
    609.65x = 292,564.65
  5. Step 5: Solve for x
    x = 292,564.65/609.65
  6. Step 6: Final answer
    x = 479.89

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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.