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Finding the Fourth Proportional to 922.84, 1,384.26 and 409.84

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Solution

The fourth proportional to 922.84, 1,384.26 and 409.84 is: 614.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.84 : 1,384.26 = 409.84 : x
  2. Step 2: Convert to fraction form
    922.84/1,384.26 = 409.84/x
  3. Step 3: Cross multiply
    922.84x = 1,384.26 × 409.84
  4. Step 4: Simplify right side
    922.84x = 567,325.12
  5. Step 5: Solve for x
    x = 567,325.12/922.84
  6. Step 6: Final answer
    x = 614.76

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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.