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Finding the Fourth Proportional to 743.98, 1,115.52 and 354.10

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Solution

The fourth proportional to 743.98, 1,115.52 and 354.10 is: 530.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.98 : 1,115.52 = 354.10 : x
  2. Step 2: Convert to fraction form
    743.98/1,115.52 = 354.10/x
  3. Step 3: Cross multiply
    743.98x = 1,115.52 × 354.10
  4. Step 4: Simplify right side
    743.98x = 395,005.63
  5. Step 5: Solve for x
    x = 395,005.63/743.98
  6. Step 6: Final answer
    x = 530.94

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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.