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Finding the Fourth Proportional to 487.94, 730.94 and 256.48

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Solution

The fourth proportional to 487.94, 730.94 and 256.48 is: 384.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.94 : 730.94 = 256.48 : x
  2. Step 2: Convert to fraction form
    487.94/730.94 = 256.48/x
  3. Step 3: Cross multiply
    487.94x = 730.94 × 256.48
  4. Step 4: Simplify right side
    487.94x = 187,468.38
  5. Step 5: Solve for x
    x = 187,468.38/487.94
  6. Step 6: Final answer
    x = 384.21

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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.