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Finding the Fourth Proportional to 626.40, 864.51 and 360.84

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Solution

The fourth proportional to 626.40, 864.51 and 360.84 is: 498.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.40 : 864.51 = 360.84 : x
  2. Step 2: Convert to fraction form
    626.40/864.51 = 360.84/x
  3. Step 3: Cross multiply
    626.40x = 864.51 × 360.84
  4. Step 4: Simplify right side
    626.40x = 311,949.79
  5. Step 5: Solve for x
    x = 311,949.79/626.40
  6. Step 6: Final answer
    x = 498.00

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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.