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Finding the Fourth Proportional to 608.64, 912.54 and 315.57

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Solution

The fourth proportional to 608.64, 912.54 and 315.57 is: 473.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.64 : 912.54 = 315.57 : x
  2. Step 2: Convert to fraction form
    608.64/912.54 = 315.57/x
  3. Step 3: Cross multiply
    608.64x = 912.54 × 315.57
  4. Step 4: Simplify right side
    608.64x = 287,970.25
  5. Step 5: Solve for x
    x = 287,970.25/608.64
  6. Step 6: Final answer
    x = 473.14

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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.