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Finding the Fourth Proportional to 1,477.94, 2,215.49 and 553.24

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Solution

The fourth proportional to 1,477.94, 2,215.49 and 553.24 is: 829.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,477.94 : 2,215.49 = 553.24 : x
  2. Step 2: Convert to fraction form
    1,477.94/2,215.49 = 553.24/x
  3. Step 3: Cross multiply
    1,477.94x = 2,215.49 × 553.24
  4. Step 4: Simplify right side
    1,477.94x = 1,225,697.69
  5. Step 5: Solve for x
    x = 1,225,697.69/1,477.94
  6. Step 6: Final answer
    x = 829.33

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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.