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Finding the Fourth Proportional to 743.76, 1,026.53 and 429.21

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Solution

The fourth proportional to 743.76, 1,026.53 and 429.21 is: 592.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.76 : 1,026.53 = 429.21 : x
  2. Step 2: Convert to fraction form
    743.76/1,026.53 = 429.21/x
  3. Step 3: Cross multiply
    743.76x = 1,026.53 × 429.21
  4. Step 4: Simplify right side
    743.76x = 440,589.66
  5. Step 5: Solve for x
    x = 440,589.66/743.76
  6. Step 6: Final answer
    x = 592.39

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.