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Finding the Fourth Proportional to 1,015.30, 1,401.09 and 601.30

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Solution

The fourth proportional to 1,015.30, 1,401.09 and 601.30 is: 829.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.30 : 1,401.09 = 601.30 : x
  2. Step 2: Convert to fraction form
    1,015.30/1,401.09 = 601.30/x
  3. Step 3: Cross multiply
    1,015.30x = 1,401.09 × 601.30
  4. Step 4: Simplify right side
    1,015.30x = 842,475.42
  5. Step 5: Solve for x
    x = 842,475.42/1,015.30
  6. Step 6: Final answer
    x = 829.78

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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.