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Finding the Fourth Proportional to 858.92, 1,187.52 and 760.44

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Solution

The fourth proportional to 858.92, 1,187.52 and 760.44 is: 1,051.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.92 : 1,187.52 = 760.44 : x
  2. Step 2: Convert to fraction form
    858.92/1,187.52 = 760.44/x
  3. Step 3: Cross multiply
    858.92x = 1,187.52 × 760.44
  4. Step 4: Simplify right side
    858.92x = 903,037.71
  5. Step 5: Solve for x
    x = 903,037.71/858.92
  6. Step 6: Final answer
    x = 1,051.36

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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.