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Finding the Fourth Proportional to 724.24, 999.09 and 429.40

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Solution

The fourth proportional to 724.24, 999.09 and 429.40 is: 592.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.24 : 999.09 = 429.40 : x
  2. Step 2: Convert to fraction form
    724.24/999.09 = 429.40/x
  3. Step 3: Cross multiply
    724.24x = 999.09 × 429.40
  4. Step 4: Simplify right side
    724.24x = 429,009.25
  5. Step 5: Solve for x
    x = 429,009.25/724.24
  6. Step 6: Final answer
    x = 592.36

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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.