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Finding the Fourth Proportional to 664.04, 916.64 and 484.85

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Solution

The fourth proportional to 664.04, 916.64 and 484.85 is: 669.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.04 : 916.64 = 484.85 : x
  2. Step 2: Convert to fraction form
    664.04/916.64 = 484.85/x
  3. Step 3: Cross multiply
    664.04x = 916.64 × 484.85
  4. Step 4: Simplify right side
    664.04x = 444,432.90
  5. Step 5: Solve for x
    x = 444,432.90/664.04
  6. Step 6: Final answer
    x = 669.29

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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.