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Finding the Fourth Proportional to 1,057.13, 1,458.50 and 684.39

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Solution

The fourth proportional to 1,057.13, 1,458.50 and 684.39 is: 944.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,057.13 : 1,458.50 = 684.39 : x
  2. Step 2: Convert to fraction form
    1,057.13/1,458.50 = 684.39/x
  3. Step 3: Cross multiply
    1,057.13x = 1,458.50 × 684.39
  4. Step 4: Simplify right side
    1,057.13x = 998,179.39
  5. Step 5: Solve for x
    x = 998,179.39/1,057.13
  6. Step 6: Final answer
    x = 944.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.