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Finding the Fourth Proportional to 644.38, 888.60 and 434.32

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Solution

The fourth proportional to 644.38, 888.60 and 434.32 is: 598.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.38 : 888.60 = 434.32 : x
  2. Step 2: Convert to fraction form
    644.38/888.60 = 434.32/x
  3. Step 3: Cross multiply
    644.38x = 888.60 × 434.32
  4. Step 4: Simplify right side
    644.38x = 385,936.75
  5. Step 5: Solve for x
    x = 385,936.75/644.38
  6. Step 6: Final answer
    x = 598.93

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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.