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Finding the Fourth Proportional to 1,017.16, 1,523.58 and 940.30

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Solution

The fourth proportional to 1,017.16, 1,523.58 and 940.30 is: 1,408.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017.16 : 1,523.58 = 940.30 : x
  2. Step 2: Convert to fraction form
    1,017.16/1,523.58 = 940.30/x
  3. Step 3: Cross multiply
    1,017.16x = 1,523.58 × 940.30
  4. Step 4: Simplify right side
    1,017.16x = 1,432,622.27
  5. Step 5: Solve for x
    x = 1,432,622.27/1,017.16
  6. Step 6: Final answer
    x = 1,408.45

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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.