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Finding the Fourth Proportional to 718.36, 1,077.90 and 353.48

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Solution

The fourth proportional to 718.36, 1,077.90 and 353.48 is: 530.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.36 : 1,077.90 = 353.48 : x
  2. Step 2: Convert to fraction form
    718.36/1,077.90 = 353.48/x
  3. Step 3: Cross multiply
    718.36x = 1,077.90 × 353.48
  4. Step 4: Simplify right side
    718.36x = 381,016.09
  5. Step 5: Solve for x
    x = 381,016.09/718.36
  6. Step 6: Final answer
    x = 530.40

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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.