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Finding the Fourth Proportional to 1,617.55, 2,425.97 and 578.20

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Solution

The fourth proportional to 1,617.55, 2,425.97 and 578.20 is: 867.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,617.55 : 2,425.97 = 578.20 : x
  2. Step 2: Convert to fraction form
    1,617.55/2,425.97 = 578.20/x
  3. Step 3: Cross multiply
    1,617.55x = 2,425.97 × 578.20
  4. Step 4: Simplify right side
    1,617.55x = 1,402,692.96
  5. Step 5: Solve for x
    x = 1,402,692.96/1,617.55
  6. Step 6: Final answer
    x = 867.17

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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.