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Finding the Fourth Proportional to 1,056.42, 1,584.74 and 440.49

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Solution

The fourth proportional to 1,056.42, 1,584.74 and 440.49 is: 660.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,056.42 : 1,584.74 = 440.49 : x
  2. Step 2: Convert to fraction form
    1,056.42/1,584.74 = 440.49/x
  3. Step 3: Cross multiply
    1,056.42x = 1,584.74 × 440.49
  4. Step 4: Simplify right side
    1,056.42x = 698,059.01
  5. Step 5: Solve for x
    x = 698,059.01/1,056.42
  6. Step 6: Final answer
    x = 660.78

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.