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Finding the Fourth Proportional to 620.34, 930.05 and 291.51

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Solution

The fourth proportional to 620.34, 930.05 and 291.51 is: 437.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.34 : 930.05 = 291.51 : x
  2. Step 2: Convert to fraction form
    620.34/930.05 = 291.51/x
  3. Step 3: Cross multiply
    620.34x = 930.05 × 291.51
  4. Step 4: Simplify right side
    620.34x = 271,115.82
  5. Step 5: Solve for x
    x = 271,115.82/620.34
  6. Step 6: Final answer
    x = 437.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.