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Finding the Fourth Proportional to 608.64, 913.50 and 319.74

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Solution

The fourth proportional to 608.64, 913.50 and 319.74 is: 479.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.64 : 913.50 = 319.74 : x
  2. Step 2: Convert to fraction form
    608.64/913.50 = 319.74/x
  3. Step 3: Cross multiply
    608.64x = 913.50 × 319.74
  4. Step 4: Simplify right side
    608.64x = 292,082.49
  5. Step 5: Solve for x
    x = 292,082.49/608.64
  6. Step 6: Final answer
    x = 479.89

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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.