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Finding the Fourth Proportional to 1,415.52, 1,954.08 and 918.84

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Solution

The fourth proportional to 1,415.52, 1,954.08 and 918.84 is: 1,268.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.52 : 1,954.08 = 918.84 : x
  2. Step 2: Convert to fraction form
    1,415.52/1,954.08 = 918.84/x
  3. Step 3: Cross multiply
    1,415.52x = 1,954.08 × 918.84
  4. Step 4: Simplify right side
    1,415.52x = 1,795,486.87
  5. Step 5: Solve for x
    x = 1,795,486.87/1,415.52
  6. Step 6: Final answer
    x = 1,268.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.