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Finding the Fourth Proportional to 708.93, 978.12 and 414.15

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Solution

The fourth proportional to 708.93, 978.12 and 414.15 is: 571.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.93 : 978.12 = 414.15 : x
  2. Step 2: Convert to fraction form
    708.93/978.12 = 414.15/x
  3. Step 3: Cross multiply
    708.93x = 978.12 × 414.15
  4. Step 4: Simplify right side
    708.93x = 405,088.40
  5. Step 5: Solve for x
    x = 405,088.40/708.93
  6. Step 6: Final answer
    x = 571.41

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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.