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Finding the Fourth Proportional to 1,283.84, 1,925.99 and 406.56

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Solution

The fourth proportional to 1,283.84, 1,925.99 and 406.56 is: 609.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.84 : 1,925.99 = 406.56 : x
  2. Step 2: Convert to fraction form
    1,283.84/1,925.99 = 406.56/x
  3. Step 3: Cross multiply
    1,283.84x = 1,925.99 × 406.56
  4. Step 4: Simplify right side
    1,283.84x = 783,020.86
  5. Step 5: Solve for x
    x = 783,020.86/1,283.84
  6. Step 6: Final answer
    x = 609.91

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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.