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Finding the Fourth Proportional to 1,437.85, 2,157.23 and 513.39

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Solution

The fourth proportional to 1,437.85, 2,157.23 and 513.39 is: 770.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,437.85 : 2,157.23 = 513.39 : x
  2. Step 2: Convert to fraction form
    1,437.85/2,157.23 = 513.39/x
  3. Step 3: Cross multiply
    1,437.85x = 2,157.23 × 513.39
  4. Step 4: Simplify right side
    1,437.85x = 1,107,496.10
  5. Step 5: Solve for x
    x = 1,107,496.10/1,437.85
  6. Step 6: Final answer
    x = 770.24

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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.