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Finding the Fourth Proportional to 723.76, 998.76 and 429.16

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Solution

The fourth proportional to 723.76, 998.76 and 429.16 is: 592.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.76 : 998.76 = 429.16 : x
  2. Step 2: Convert to fraction form
    723.76/998.76 = 429.16/x
  3. Step 3: Cross multiply
    723.76x = 998.76 × 429.16
  4. Step 4: Simplify right side
    723.76x = 428,627.84
  5. Step 5: Solve for x
    x = 428,627.84/723.76
  6. Step 6: Final answer
    x = 592.22

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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.