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Finding the Fourth Proportional to 1,283.82, 1,925.90 and 417.84

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Solution

The fourth proportional to 1,283.82, 1,925.90 and 417.84 is: 626.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.82 : 1,925.90 = 417.84 : x
  2. Step 2: Convert to fraction form
    1,283.82/1,925.90 = 417.84/x
  3. Step 3: Cross multiply
    1,283.82x = 1,925.90 × 417.84
  4. Step 4: Simplify right side
    1,283.82x = 804,718.06
  5. Step 5: Solve for x
    x = 804,718.06/1,283.82
  6. Step 6: Final answer
    x = 626.82

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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.