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Finding the Fourth Proportional to 705.60, 973.76 and 425.79

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Solution

The fourth proportional to 705.60, 973.76 and 425.79 is: 587.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.60 : 973.76 = 425.79 : x
  2. Step 2: Convert to fraction form
    705.60/973.76 = 425.79/x
  3. Step 3: Cross multiply
    705.60x = 973.76 × 425.79
  4. Step 4: Simplify right side
    705.60x = 414,615.14
  5. Step 5: Solve for x
    x = 414,615.14/705.60
  6. Step 6: Final answer
    x = 587.61

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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.