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Finding the Fourth Proportional to 1,056.88, 1,586.25 and 440.57

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Solution

The fourth proportional to 1,056.88, 1,586.25 and 440.57 is: 661.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,056.88 : 1,586.25 = 440.57 : x
  2. Step 2: Convert to fraction form
    1,056.88/1,586.25 = 440.57/x
  3. Step 3: Cross multiply
    1,056.88x = 1,586.25 × 440.57
  4. Step 4: Simplify right side
    1,056.88x = 698,858.13
  5. Step 5: Solve for x
    x = 698,858.13/1,056.88
  6. Step 6: Final answer
    x = 661.25

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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.