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Finding the Fourth Proportional to 923.88, 1,384.96 and 490.60

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Solution

The fourth proportional to 923.88, 1,384.96 and 490.60 is: 735.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.88 : 1,384.96 = 490.60 : x
  2. Step 2: Convert to fraction form
    923.88/1,384.96 = 490.60/x
  3. Step 3: Cross multiply
    923.88x = 1,384.96 × 490.60
  4. Step 4: Simplify right side
    923.88x = 679,461.38
  5. Step 5: Solve for x
    x = 679,461.38/923.88
  6. Step 6: Final answer
    x = 735.44

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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.