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Finding the Fourth Proportional to 743.47, 1,114.90 and 304.94

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Solution

The fourth proportional to 743.47, 1,114.90 and 304.94 is: 457.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.47 : 1,114.90 = 304.94 : x
  2. Step 2: Convert to fraction form
    743.47/1,114.90 = 304.94/x
  3. Step 3: Cross multiply
    743.47x = 1,114.90 × 304.94
  4. Step 4: Simplify right side
    743.47x = 339,979.63
  5. Step 5: Solve for x
    x = 339,979.63/743.47
  6. Step 6: Final answer
    x = 457.29

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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.