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Finding the Fourth Proportional to 1,477.38, 2,216.25 and 611.94

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Solution

The fourth proportional to 1,477.38, 2,216.25 and 611.94 is: 917.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,477.38 : 2,216.25 = 611.94 : x
  2. Step 2: Convert to fraction form
    1,477.38/2,216.25 = 611.94/x
  3. Step 3: Cross multiply
    1,477.38x = 2,216.25 × 611.94
  4. Step 4: Simplify right side
    1,477.38x = 1,356,212.03
  5. Step 5: Solve for x
    x = 1,356,212.03/1,477.38
  6. Step 6: Final answer
    x = 917.98

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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.