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Finding the Fourth Proportional to 603.78, 900.78 and 547.92

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Solution

The fourth proportional to 603.78, 900.78 and 547.92 is: 817.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.78 : 900.78 = 547.92 : x
  2. Step 2: Convert to fraction form
    603.78/900.78 = 547.92/x
  3. Step 3: Cross multiply
    603.78x = 900.78 × 547.92
  4. Step 4: Simplify right side
    603.78x = 493,555.38
  5. Step 5: Solve for x
    x = 493,555.38/603.78
  6. Step 6: Final answer
    x = 817.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.