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Finding the Fourth Proportional to 664.01, 916.28 and 380.39

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Solution

The fourth proportional to 664.01, 916.28 and 380.39 is: 524.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.01 : 916.28 = 380.39 : x
  2. Step 2: Convert to fraction form
    664.01/916.28 = 380.39/x
  3. Step 3: Cross multiply
    664.01x = 916.28 × 380.39
  4. Step 4: Simplify right side
    664.01x = 348,537.27
  5. Step 5: Solve for x
    x = 348,537.27/664.01
  6. Step 6: Final answer
    x = 524.90

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1.5x scale

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.