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Finding the Fourth Proportional to 1,031.75, 1,423.82 and 617.75

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Solution

The fourth proportional to 1,031.75, 1,423.82 and 617.75 is: 852.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.75 : 1,423.82 = 617.75 : x
  2. Step 2: Convert to fraction form
    1,031.75/1,423.82 = 617.75/x
  3. Step 3: Cross multiply
    1,031.75x = 1,423.82 × 617.75
  4. Step 4: Simplify right side
    1,031.75x = 879,564.81
  5. Step 5: Solve for x
    x = 879,564.81/1,031.75
  6. Step 6: Final answer
    x = 852.50

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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.