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Finding the Fourth Proportional to 743.23, 1,114.71 and 256.27

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Solution

The fourth proportional to 743.23, 1,114.71 and 256.27 is: 384.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.23 : 1,114.71 = 256.27 : x
  2. Step 2: Convert to fraction form
    743.23/1,114.71 = 256.27/x
  3. Step 3: Cross multiply
    743.23x = 1,114.71 × 256.27
  4. Step 4: Simplify right side
    743.23x = 285,666.73
  5. Step 5: Solve for x
    x = 285,666.73/743.23
  6. Step 6: Final answer
    x = 384.36

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1.5x scale

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.