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Finding the Fourth Proportional to 1,304.36, 1,955.30 and 438.08

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Solution

The fourth proportional to 1,304.36, 1,955.30 and 438.08 is: 656.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,304.36 : 1,955.30 = 438.08 : x
  2. Step 2: Convert to fraction form
    1,304.36/1,955.30 = 438.08/x
  3. Step 3: Cross multiply
    1,304.36x = 1,955.30 × 438.08
  4. Step 4: Simplify right side
    1,304.36x = 856,577.82
  5. Step 5: Solve for x
    x = 856,577.82/1,304.36
  6. Step 6: Final answer
    x = 656.70

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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.