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Finding the Fourth Proportional to 608.64, 839.96 and 346.65

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Solution

The fourth proportional to 608.64, 839.96 and 346.65 is: 478.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.64 : 839.96 = 346.65 : x
  2. Step 2: Convert to fraction form
    608.64/839.96 = 346.65/x
  3. Step 3: Cross multiply
    608.64x = 839.96 × 346.65
  4. Step 4: Simplify right side
    608.64x = 291,172.13
  5. Step 5: Solve for x
    x = 291,172.13/608.64
  6. Step 6: Final answer
    x = 478.40

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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.