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Finding the Fourth Proportional to 707.57, 976.48 and 427.76

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Solution

The fourth proportional to 707.57, 976.48 and 427.76 is: 590.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.57 : 976.48 = 427.76 : x
  2. Step 2: Convert to fraction form
    707.57/976.48 = 427.76/x
  3. Step 3: Cross multiply
    707.57x = 976.48 × 427.76
  4. Step 4: Simplify right side
    707.57x = 417,693.13
  5. Step 5: Solve for x
    x = 417,693.13/707.57
  6. Step 6: Final answer
    x = 590.32

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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.