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Finding the Fourth Proportional to 1,056.60, 1,584.04 and 440.76

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Solution

The fourth proportional to 1,056.60, 1,584.04 and 440.76 is: 660.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,056.60 : 1,584.04 = 440.76 : x
  2. Step 2: Convert to fraction form
    1,056.60/1,584.04 = 440.76/x
  3. Step 3: Cross multiply
    1,056.60x = 1,584.04 × 440.76
  4. Step 4: Simplify right side
    1,056.60x = 698,187.96
  5. Step 5: Solve for x
    x = 698,187.96/1,056.60
  6. Step 6: Final answer
    x = 660.79

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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.