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Finding the Fourth Proportional to 626.64, 864.93 and 479.22

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Solution

The fourth proportional to 626.64, 864.93 and 479.22 is: 661.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.64 : 864.93 = 479.22 : x
  2. Step 2: Convert to fraction form
    626.64/864.93 = 479.22/x
  3. Step 3: Cross multiply
    626.64x = 864.93 × 479.22
  4. Step 4: Simplify right side
    626.64x = 414,491.75
  5. Step 5: Solve for x
    x = 414,491.75/626.64
  6. Step 6: Final answer
    x = 661.45

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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.