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Finding the Fourth Proportional to 1,130.72, 1,696.33 and 400.30

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Solution

The fourth proportional to 1,130.72, 1,696.33 and 400.30 is: 600.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.72 : 1,696.33 = 400.30 : x
  2. Step 2: Convert to fraction form
    1,130.72/1,696.33 = 400.30/x
  3. Step 3: Cross multiply
    1,130.72x = 1,696.33 × 400.30
  4. Step 4: Simplify right side
    1,130.72x = 679,040.90
  5. Step 5: Solve for x
    x = 679,040.90/1,130.72
  6. Step 6: Final answer
    x = 600.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.