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Finding the Fourth Proportional to 645.32, 889.67 and 504.89

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Solution

The fourth proportional to 645.32, 889.67 and 504.89 is: 696.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.32 : 889.67 = 504.89 : x
  2. Step 2: Convert to fraction form
    645.32/889.67 = 504.89/x
  3. Step 3: Cross multiply
    645.32x = 889.67 × 504.89
  4. Step 4: Simplify right side
    645.32x = 449,178.51
  5. Step 5: Solve for x
    x = 449,178.51/645.32
  6. Step 6: Final answer
    x = 696.06

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1.5x scale

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.