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Finding the Fourth Proportional to 1,156.31, 1,728.84 and 984.99

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Solution

The fourth proportional to 1,156.31, 1,728.84 and 984.99 is: 1,472.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,156.31 : 1,728.84 = 984.99 : x
  2. Step 2: Convert to fraction form
    1,156.31/1,728.84 = 984.99/x
  3. Step 3: Cross multiply
    1,156.31x = 1,728.84 × 984.99
  4. Step 4: Simplify right side
    1,156.31x = 1,702,900.29
  5. Step 5: Solve for x
    x = 1,702,900.29/1,156.31
  6. Step 6: Final answer
    x = 1,472.70

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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.