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Finding the Fourth Proportional to 707.16, 976.18 and 427.34

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Solution

The fourth proportional to 707.16, 976.18 and 427.34 is: 589.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.16 : 976.18 = 427.34 : x
  2. Step 2: Convert to fraction form
    707.16/976.18 = 427.34/x
  3. Step 3: Cross multiply
    707.16x = 976.18 × 427.34
  4. Step 4: Simplify right side
    707.16x = 417,160.76
  5. Step 5: Solve for x
    x = 417,160.76/707.16
  6. Step 6: Final answer
    x = 589.91

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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.