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Finding the Fourth Proportional to 743.75, 1,026.57 and 429.05

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Solution

The fourth proportional to 743.75, 1,026.57 and 429.05 is: 592.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.75 : 1,026.57 = 429.05 : x
  2. Step 2: Convert to fraction form
    743.75/1,026.57 = 429.05/x
  3. Step 3: Cross multiply
    743.75x = 1,026.57 × 429.05
  4. Step 4: Simplify right side
    743.75x = 440,449.86
  5. Step 5: Solve for x
    x = 440,449.86/743.75
  6. Step 6: Final answer
    x = 592.20

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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.