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Finding the Fourth Proportional to 1,437.87, 2,156.13 and 615.72

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Solution

The fourth proportional to 1,437.87, 2,156.13 and 615.72 is: 923.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,437.87 : 2,156.13 = 615.72 : x
  2. Step 2: Convert to fraction form
    1,437.87/2,156.13 = 615.72/x
  3. Step 3: Cross multiply
    1,437.87x = 2,156.13 × 615.72
  4. Step 4: Simplify right side
    1,437.87x = 1,327,572.36
  5. Step 5: Solve for x
    x = 1,327,572.36/1,437.87
  6. Step 6: Final answer
    x = 923.29

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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.