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Finding the Fourth Proportional to 664.08, 916.92 and 499.02

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Solution

The fourth proportional to 664.08, 916.92 and 499.02 is: 689.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.08 : 916.92 = 499.02 : x
  2. Step 2: Convert to fraction form
    664.08/916.92 = 499.02/x
  3. Step 3: Cross multiply
    664.08x = 916.92 × 499.02
  4. Step 4: Simplify right side
    664.08x = 457,561.42
  5. Step 5: Solve for x
    x = 457,561.42/664.08
  6. Step 6: Final answer
    x = 689.02

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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.