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Finding the Fourth Proportional to 709.32, 979.06 and 429.64

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Solution

The fourth proportional to 709.32, 979.06 and 429.64 is: 593.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.32 : 979.06 = 429.64 : x
  2. Step 2: Convert to fraction form
    709.32/979.06 = 429.64/x
  3. Step 3: Cross multiply
    709.32x = 979.06 × 429.64
  4. Step 4: Simplify right side
    709.32x = 420,643.34
  5. Step 5: Solve for x
    x = 420,643.34/709.32
  6. Step 6: Final answer
    x = 593.02

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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.