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Finding the Fourth Proportional to 1,037.30, 1,431.30 and 617.63

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Solution

The fourth proportional to 1,037.30, 1,431.30 and 617.63 is: 852.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,037.30 : 1,431.30 = 617.63 : x
  2. Step 2: Convert to fraction form
    1,037.30/1,431.30 = 617.63/x
  3. Step 3: Cross multiply
    1,037.30x = 1,431.30 × 617.63
  4. Step 4: Simplify right side
    1,037.30x = 884,006.66
  5. Step 5: Solve for x
    x = 884,006.66/1,037.30
  6. Step 6: Final answer
    x = 852.22

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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.