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Finding the Fourth Proportional to 786.94, 1,086.01 and 437.63

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Solution

The fourth proportional to 786.94, 1,086.01 and 437.63 is: 603.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    786.94 : 1,086.01 = 437.63 : x
  2. Step 2: Convert to fraction form
    786.94/1,086.01 = 437.63/x
  3. Step 3: Cross multiply
    786.94x = 1,086.01 × 437.63
  4. Step 4: Simplify right side
    786.94x = 475,264.03
  5. Step 5: Solve for x
    x = 475,264.03/786.94
  6. Step 6: Final answer
    x = 603.94

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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.