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Finding the Fourth Proportional to 709.66, 978.93 and 429.99

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Solution

The fourth proportional to 709.66, 978.93 and 429.99 is: 593.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.66 : 978.93 = 429.99 : x
  2. Step 2: Convert to fraction form
    709.66/978.93 = 429.99/x
  3. Step 3: Cross multiply
    709.66x = 978.93 × 429.99
  4. Step 4: Simplify right side
    709.66x = 420,930.11
  5. Step 5: Solve for x
    x = 420,930.11/709.66
  6. Step 6: Final answer
    x = 593.14

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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.