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Finding the Fourth Proportional to 608.16, 840.28 and 484.74

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Solution

The fourth proportional to 608.16, 840.28 and 484.74 is: 669.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.16 : 840.28 = 484.74 : x
  2. Step 2: Convert to fraction form
    608.16/840.28 = 484.74/x
  3. Step 3: Cross multiply
    608.16x = 840.28 × 484.74
  4. Step 4: Simplify right side
    608.16x = 407,317.33
  5. Step 5: Solve for x
    x = 407,317.33/608.16
  6. Step 6: Final answer
    x = 669.75

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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.