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Finding the Fourth Proportional to 1,037.45, 1,431.46 and 659.45

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Solution

The fourth proportional to 1,037.45, 1,431.46 and 659.45 is: 909.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,037.45 : 1,431.46 = 659.45 : x
  2. Step 2: Convert to fraction form
    1,037.45/1,431.46 = 659.45/x
  3. Step 3: Cross multiply
    1,037.45x = 1,431.46 × 659.45
  4. Step 4: Simplify right side
    1,037.45x = 943,978.53
  5. Step 5: Solve for x
    x = 943,978.53/1,037.45
  6. Step 6: Final answer
    x = 909.90

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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.