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Finding the Fourth Proportional to 1,118.77, 1,678.56 and 541.24

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Solution

The fourth proportional to 1,118.77, 1,678.56 and 541.24 is: 812.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118.77 : 1,678.56 = 541.24 : x
  2. Step 2: Convert to fraction form
    1,118.77/1,678.56 = 541.24/x
  3. Step 3: Cross multiply
    1,118.77x = 1,678.56 × 541.24
  4. Step 4: Simplify right side
    1,118.77x = 908,492.72
  5. Step 5: Solve for x
    x = 908,492.72/1,118.77
  6. Step 6: Final answer
    x = 812.05

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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.