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Finding the Fourth Proportional to 1,125.06, 1,687.73 and 384.81

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Solution

The fourth proportional to 1,125.06, 1,687.73 and 384.81 is: 577.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.06 : 1,687.73 = 384.81 : x
  2. Step 2: Convert to fraction form
    1,125.06/1,687.73 = 384.81/x
  3. Step 3: Cross multiply
    1,125.06x = 1,687.73 × 384.81
  4. Step 4: Simplify right side
    1,125.06x = 649,460.89
  5. Step 5: Solve for x
    x = 649,460.89/1,125.06
  6. Step 6: Final answer
    x = 577.27

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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.