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Finding the Fourth Proportional to 603.30, 904.40 and 278.48

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Solution

The fourth proportional to 603.30, 904.40 and 278.48 is: 417.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.30 : 904.40 = 278.48 : x
  2. Step 2: Convert to fraction form
    603.30/904.40 = 278.48/x
  3. Step 3: Cross multiply
    603.30x = 904.40 × 278.48
  4. Step 4: Simplify right side
    603.30x = 251,857.31
  5. Step 5: Solve for x
    x = 251,857.31/603.30
  6. Step 6: Final answer
    x = 417.47

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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.