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Finding the Fourth Proportional to 743.55, 1,115.38 and 223.51

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Solution

The fourth proportional to 743.55, 1,115.38 and 223.51 is: 335.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.55 : 1,115.38 = 223.51 : x
  2. Step 2: Convert to fraction form
    743.55/1,115.38 = 223.51/x
  3. Step 3: Cross multiply
    743.55x = 1,115.38 × 223.51
  4. Step 4: Simplify right side
    743.55x = 249,298.58
  5. Step 5: Solve for x
    x = 249,298.58/743.55
  6. Step 6: Final answer
    x = 335.28

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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.