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Finding the Fourth Proportional to 1,056.62, 1,585.27 and 440.39

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Solution

The fourth proportional to 1,056.62, 1,585.27 and 440.39 is: 660.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,056.62 : 1,585.27 = 440.39 : x
  2. Step 2: Convert to fraction form
    1,056.62/1,585.27 = 440.39/x
  3. Step 3: Cross multiply
    1,056.62x = 1,585.27 × 440.39
  4. Step 4: Simplify right side
    1,056.62x = 698,133.15
  5. Step 5: Solve for x
    x = 698,133.15/1,056.62
  6. Step 6: Final answer
    x = 660.72

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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.