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Finding the Fourth Proportional to 608.64, 912.12 and 348.72

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Solution

The fourth proportional to 608.64, 912.12 and 348.72 is: 522.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.64 : 912.12 = 348.72 : x
  2. Step 2: Convert to fraction form
    608.64/912.12 = 348.72/x
  3. Step 3: Cross multiply
    608.64x = 912.12 × 348.72
  4. Step 4: Simplify right side
    608.64x = 318,074.49
  5. Step 5: Solve for x
    x = 318,074.49/608.64
  6. Step 6: Final answer
    x = 522.60

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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.