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Finding the Fourth Proportional to 1,437.81, 2,156.81 and 513.46

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Solution

The fourth proportional to 1,437.81, 2,156.81 and 513.46 is: 770.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,437.81 : 2,156.81 = 513.46 : x
  2. Step 2: Convert to fraction form
    1,437.81/2,156.81 = 513.46/x
  3. Step 3: Cross multiply
    1,437.81x = 2,156.81 × 513.46
  4. Step 4: Simplify right side
    1,437.81x = 1,107,435.66
  5. Step 5: Solve for x
    x = 1,107,435.66/1,437.81
  6. Step 6: Final answer
    x = 770.22

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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.