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Finding the Fourth Proportional to 603.21, 904.95 and 256.55

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Solution

The fourth proportional to 603.21, 904.95 and 256.55 is: 384.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.21 : 904.95 = 256.55 : x
  2. Step 2: Convert to fraction form
    603.21/904.95 = 256.55/x
  3. Step 3: Cross multiply
    603.21x = 904.95 × 256.55
  4. Step 4: Simplify right side
    603.21x = 232,165.90
  5. Step 5: Solve for x
    x = 232,165.90/603.21
  6. Step 6: Final answer
    x = 384.89

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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.