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Finding the Fourth Proportional to 1,143.37, 1,712.62 and 557.47

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Solution

The fourth proportional to 1,143.37, 1,712.62 and 557.47 is: 835.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,143.37 : 1,712.62 = 557.47 : x
  2. Step 2: Convert to fraction form
    1,143.37/1,712.62 = 557.47/x
  3. Step 3: Cross multiply
    1,143.37x = 1,712.62 × 557.47
  4. Step 4: Simplify right side
    1,143.37x = 954,734.27
  5. Step 5: Solve for x
    x = 954,734.27/1,143.37
  6. Step 6: Final answer
    x = 835.02

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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.