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Finding the Fourth Proportional to 1,445.64, 2,168.28 and 471.66

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Solution

The fourth proportional to 1,445.64, 2,168.28 and 471.66 is: 707.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,445.64 : 2,168.28 = 471.66 : x
  2. Step 2: Convert to fraction form
    1,445.64/2,168.28 = 471.66/x
  3. Step 3: Cross multiply
    1,445.64x = 2,168.28 × 471.66
  4. Step 4: Simplify right side
    1,445.64x = 1,022,690.94
  5. Step 5: Solve for x
    x = 1,022,690.94/1,445.64
  6. Step 6: Final answer
    x = 707.43

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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.