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Finding the Fourth Proportional to 664.65, 917.67 and 609.18

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Solution

The fourth proportional to 664.65, 917.67 and 609.18 is: 841.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.65 : 917.67 = 609.18 : x
  2. Step 2: Convert to fraction form
    664.65/917.67 = 609.18/x
  3. Step 3: Cross multiply
    664.65x = 917.67 × 609.18
  4. Step 4: Simplify right side
    664.65x = 559,026.21
  5. Step 5: Solve for x
    x = 559,026.21/664.65
  6. Step 6: Final answer
    x = 841.08

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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.