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Finding the Fourth Proportional to 608.96, 913.20 and 472.16

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Solution

The fourth proportional to 608.96, 913.20 and 472.16 is: 708.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.96 : 913.20 = 472.16 : x
  2. Step 2: Convert to fraction form
    608.96/913.20 = 472.16/x
  3. Step 3: Cross multiply
    608.96x = 913.20 × 472.16
  4. Step 4: Simplify right side
    608.96x = 431,176.51
  5. Step 5: Solve for x
    x = 431,176.51/608.96
  6. Step 6: Final answer
    x = 708.05

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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.