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Finding the Fourth Proportional to 723.89, 999.05 and 429.18

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Solution

The fourth proportional to 723.89, 999.05 and 429.18 is: 592.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.89 : 999.05 = 429.18 : x
  2. Step 2: Convert to fraction form
    723.89/999.05 = 429.18/x
  3. Step 3: Cross multiply
    723.89x = 999.05 × 429.18
  4. Step 4: Simplify right side
    723.89x = 428,770.13
  5. Step 5: Solve for x
    x = 428,770.13/723.89
  6. Step 6: Final answer
    x = 592.32

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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.