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Finding the Fourth Proportional to 1,625.72, 2,438.58 and 471.64

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Solution

The fourth proportional to 1,625.72, 2,438.58 and 471.64 is: 707.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,625.72 : 2,438.58 = 471.64 : x
  2. Step 2: Convert to fraction form
    1,625.72/2,438.58 = 471.64/x
  3. Step 3: Cross multiply
    1,625.72x = 2,438.58 × 471.64
  4. Step 4: Simplify right side
    1,625.72x = 1,150,131.87
  5. Step 5: Solve for x
    x = 1,150,131.87/1,625.72
  6. Step 6: Final answer
    x = 707.46

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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.