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Finding the Fourth Proportional to 665.03, 917.82 and 479.13

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Solution

The fourth proportional to 665.03, 917.82 and 479.13 is: 661.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.03 : 917.82 = 479.13 : x
  2. Step 2: Convert to fraction form
    665.03/917.82 = 479.13/x
  3. Step 3: Cross multiply
    665.03x = 917.82 × 479.13
  4. Step 4: Simplify right side
    665.03x = 439,755.10
  5. Step 5: Solve for x
    x = 439,755.10/665.03
  6. Step 6: Final answer
    x = 661.26

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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.