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Finding the Fourth Proportional to 1,283.67, 1,925.64 and 418.14

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Solution

The fourth proportional to 1,283.67, 1,925.64 and 418.14 is: 627.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.67 : 1,925.64 = 418.14 : x
  2. Step 2: Convert to fraction form
    1,283.67/1,925.64 = 418.14/x
  3. Step 3: Cross multiply
    1,283.67x = 1,925.64 × 418.14
  4. Step 4: Simplify right side
    1,283.67x = 805,187.11
  5. Step 5: Solve for x
    x = 805,187.11/1,283.67
  6. Step 6: Final answer
    x = 627.25

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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.